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Endotoxins are small bacterially-derived hydrophobic lipopolysaccharide (LPS) molecules that can easily contaminate labware and whose presence can significantly impact both *in vitro* and *in vivo* experiments. Their presence is detected by the limulus amebocyte lysate ([LAL assay](https://www.sigmaaldrich.com/CA/en/product/sigma/et0200)) which can detect down to 0.01 endotoxin units (EU)/mL. Endotoxins are approximately 10 kDa in size, but readily form large aggregates up to 1,000 kDa. Bacteria shed endotoxin in large amounts upon cell death and when they are actively growing and dividing. A single Escherichia coli contains about 2 million LPS molecules per cell. Endotoxins have a high heat stability making it impossible to destroy them under regular sterilizing conditions. They are amphipathic molecules that carry a net negative charge in solution. Because of their hydrophobicity, they are likely to have strong affinities for other hydrophobic materials like plastic products used in the laboratory. For this reason, carryover contamination from laboratory beakers, stirbars, and other labware is common. ![Structure and physical properties of bacterial endotoxin](https://www.sigmaaldrich.com/content/dam/cms-commons/sigmaaldrich/marketing/global/images/technical-documents/articles/microbiological-testing/pyrogen-testing/endotoxin-mk.jpg "Structure and physical properties of bacterial endotoxin") __Figure 1.__Structure and physical properties of bacterial endotoxin. Endotoxins are complex lipopolysaccharides (LPS) present in the outer cell membrane of gram-negative bacteria. Endotoxins consist of a core polysaccharide chain, O-specific polysaccharide side chains (O-antigen) and a lipid component, Lipid A, which is responsible for the toxic effects. ## What is the difference between endotoxin vs. exotoxin? Both are potentially hazardous to cell cultures. Exotoxins are toxic substances, usually proteins, secreted by bacteria and released outside the cell. Whereas endotoxins are bacterial toxins consisting of lipids that are located within a cell wall of the bacteria. Exotoxins are usually heat destroyed whereas endotoxins cannot be destroyed by high temperature. Exotoxins have high antigenicity and elicit an immune response whereas endotoxins do not. ## How is endotoxin tested? The limulus amebocyte lysate assay (LAL assay) is the most commonly used test for endotoxin. LAL (derived from the horseshoe crab) reacts with bacterial endotoxin lipopolysaccharide (LPS), which is a membrane component of gram-negative bacteria, to form a gel-clot which can be quantified. Endotoxin is measured in endotoxin units per milliliter (EU/mL). One EU equals approximately 0.1 to 0.2 ng endotoxin/mL of solution. Currently there are three forms of the LAL assay, each with different sensitivities. The LAL gel clot assay can detect down to 0.03 EU/mL while the LAL kinetic turbidimetric and chromogenic assays can detect down to 0.01 EU/mL. ![Diagram of LAL assay test principle. ](https://www.sigmaaldrich.com/content/dam/cms-commons/sigmaaldrich/marketing/global/images/technical-documents/articles/microbiological-testing/pyrogen-testing/lal-assay-mk.jpg "Diagram of LAL assay test principle. ") __Figure 2.__LAL assay test principle. The cascade of endotoxin detection in Limulus amoebocyte lysate (LAL) assay starts when the endotoxin LPS reacts with Factor C in and turn, activates the factor B. Factor B turns the gel-forming pro-enzyme into an enzyme. The resulting clotting enzyme is responsible for anchoring the two peptide units in the coagulogen, forming an insoluble gel. Other compounds which also cause the gelation in the amebocyte lysate of the horseshoe crab can interference in the test of bacterial endotoxins. Some of these compounds are (1,3)-β-D-glucans, which lead to false positives in the LAL test. ## What are common sources of endotoxin contamination found in the lab? Thorough cleanliness in all labware, media raw materials, and proper lab techniques are essential to substantially reduce endotoxin levels in the cell culture lab. It is also recommended to filter sterilize all media using a filtration device such as [Stericup®](https://www.sigmaaldrich.com/US/en/products/cell-culture-and-analysis/sterile-lab-media-filtration-and-cultureware/stericup-vacuum-filtration) filter unit which can eliminate all potential endotoxins before introducing to cells. - Water: High purity water is essential to every laboratory. Milli-Q® Integral is a water purification system providing labs with ultrapure endotoxin-free water, directly from tap water. The system has the capacity to produce up to 300 L/day of pure and/or ultrapure water, satisfying the needs of most labs. In addition, we offer single use bottles of [endotoxin free water](https://www.sigmaaldrich.com/US/en/product/sigma/w3500) for all cell culture applications. - [Serum](https://www.sigmaaldrich.com/US/en/products/cell-culture-and-analysis/cell-culture-supplements-and-reagents/sera): Due to its biological animal source, fetal bovine serum as historically been a major culprit for harboring endotoxin. However, improved screening has significantly reduced the risks. Every lot of our serum has been tested for endotoxin levels to ensure a high level of performance. - [Cell Culture Reagents](https://www.sigmaaldrich.com/US/en/products/cell-culture-and-analysis/cell-culture-supplements-and-reagents): Common reagents like *Ecoli.* derived recombinant growth factors, hormones, lipids, basal media and dissociation reagents like trypsin can all be a source of endotoxin. We test all our cell culture tested reagent for endotoxin levels. - Plasticware/Glassware: Glassware, plastic tubing and fittings should be pyrogen-free, and reusables should be rinsed with pyrogen-free or low-endotoxin water. Plastic bottles should be sterilized by gamma irradiation. - User Contamination: Bacteria is present on all surfaces of skin, hair and saliva. Thus, proper aseptic technique while handling cell cultures is necessary to minimize the risk of introducing endotoxin into the system. ## What are the effects of endotoxin on cell cultures? Endotoxins affect both *in vitro* and *in vivo* cell growth and function and are a source of significant variability. *In vitro*, there is increasing evidence that endotoxin cause a variety of problems for cell culture research. Among the effects documented were the stimulation of leukocyte cultures to produce tissue factors, the induced production of IL-6 in equine macrophages, and the inhibition of murine erythroid colony formation by very low levels (less than 1 ng/mL) of endotoxin. *In vivo*, endotoxins elicit an inflammatory response in animal studies. The presence of endotoxin in products for injection (vaccines and injectable drugs) can result in pyrogenic responses ranging from fever and chills to irreversible and fatal septic shock. ## What are the acceptable limits of endotoxin in cell cultures? Due to the serious risks associated with endotoxin contamination, the US Food and Drug Administration (FDA) has set limits on concentration of endotoxin for medical devices and parenteral drugs that researchers should be aware of. Current FDA limits require eluates from medical devices to be less than 0.5 EU/mL unless the device comes into contact with cerebrospinal fluid where the limit is then 0.06 EU/mL. ## How do you prevent endotoxin contamination? It is essential to use endotoxin tested reagents, supplements and media from a trusted reagents supplier. It is also important to user proper aseptic techniques and thoroughly rinse and sterilize all cell culture plasticware and consumables like pipettes and conical tubes before culturing cells. ## How to remove endotoxin if cultures become contaminated? It is recommended to discard all reagents and cells if cultures become contaminated with endotoxin and start with new reagents and cells. However, if sample cannot be discarded reagents can be used to eliminate them. These [endotoxin removal solutions](https://www.sigmaaldrich.com/US/en/product/sigma/e4274) rely on the micellar properties of Triton X-114 to remove LPS endotoxins from samples. ## Materials Sorry, an unexpected error has occurred Response not successful: Received status code 500 __Related Product Categories__ - [Hydrogels](https://www.sigmaaldrich.com/CA/en/products/cell-culture-and-analysis/3d-cell-culture/hydrogels) - [Cell Culture Supplements & Reagents](https://www.sigmaaldrich.com/CA/en/products/cell-culture-and-analysis/cell-culture-supplements-and-reagents) - [Sera](https://www.sigmaaldrich.com/CA/en/products/cell-culture-and-analysis/cell-culture-supplements-and-reagents/sera) - [Stericup® Vacuum Filters](https://www.sigmaaldrich.com/CA/en/products/cell-culture-and-analysis/sterile-lab-media-filtration-and-cultureware/stericup-vacuum-filtration) Top __Sign In To Continue__ To continue reading please sign in or create an account. 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[Proteases](https://www.sigmaaldrich.com/CA/en/products/protein-biology/proteins-and-enzymes/proteases) - [Tissue Dissociation](https://www.sigmaaldrich.com/CA/en/products/protein-biology/proteins-and-enzymes/tissue-dissociation) - [Protein Mass Spectrometry](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-mass-spectrometry) - [Protein Purification Chromatography](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-purification-chromatography) - [Antibody Protein Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/antibody-protein-purification) - [Biotinylated Protein Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/biotinylated-protein-purification) - [FLAG<sup>®</sup> Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/flag-purification) - [Recombinant/Fusion Tag Protein Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/recombinant-fusion-tag-protein-purification) - [Protein Sample Prep](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep) - [Amicon<sup>®</sup> Centrifugals](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/amicon-centrifugals) - [Antibody Protein Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/antibody-protein-purification) - [Biotinylated Protein Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/biotinylated-protein-purification) - [FLAG<sup>®</sup> Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/flag-purification) - [Inhibitor Cocktails](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/inhibitor-cocktails) - [Laboratory Concentration Devices](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/laboratory-concentration-devices) - [Laboratory Dialysis & Diafiltration Devices](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/laboratory-dialysis-and-diafiltration-devices) - [Recombinant/Fusion Tag Protein Purification](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/recombinant-fusion-tag-protein-purification) - [Subcellular Fractionation Reagents](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/subcellular-fractionation-reagents) - [Whole Cell Lysis Reagents & Enhancers](https://www.sigmaaldrich.com/CA/en/products/protein-biology/protein-sample-prep/whole-cell-lysis-reagents-and-enhancers) - [Water Purification](https://www.sigmaaldrich.com/CA/en/products/water-purification) - [Milli-Q<sup>®</sup> Benchtop Water Purification Systems](https://www.sigmaaldrich.com/CA/en/products/water-purification/milli-q-benchtop-water-purification-systems) - [Milli-Q<sup>®</sup> High-Flow Water Purification Systems](https://www.sigmaaldrich.com/CA/en/products/water-purification/milli-q-high-flow-water-purification-systems) - [Milli-Q<sup>®</sup> Clinical Water Purification Systems](https://www.sigmaaldrich.com/CA/en/products/water-purification/milli-q-clinical-water-purification-systems) - [Milli-Q<sup>®</sup> Consumables](https://www.sigmaaldrich.com/CA/en/products/water-purification/milli-q-consumables) - [Milli-Q<sup>®</sup> Accessories](https://www.sigmaaldrich.com/CA/en/products/water-purification/milli-q-accessories) - Applications - [Analytical Chemistry](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry) - [Atomic Spectroscopy](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/atomic-spectroscopy) - [Calibration, Qualification, Validation](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/calibration-qualification-and-validation) - [Gas Chromatography (GC)](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/gas-chromatography) - [Liquid Chromatography](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/liquid-chromatography) - [Large Molecule HPLC](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/liquid-chromatography/large-molecule-hplc) - [Low Pressure Liquid Chromatography](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/liquid-chromatography/low-pressure-liquid-chromatography) - [Small Molecule HPLC](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/liquid-chromatography/small-molecule-hplc) - [Mass Spectrometry (MS)](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/mass-spectrometry) - [Nuclear Magnetic Resonance (NMR)](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/nuclear-magnetic-resonance) - [Photometry & Reflectometry](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/photometry-and-reflectometry) - [Sample Preparation](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/sample-preparation) - [Sample Filtration](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/sample-preparation/filtration) - [Sample Purification](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/sample-preparation/purification) - [QuEChERS Sample Preparation](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/sample-preparation/quechers) - [Solid Phase Extraction](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/sample-preparation/solid-phase-extraction) - [Solid Phase Microextraction](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/sample-preparation/solid-phase-microextraction) - [Thin Layer Chromatography (TLC)](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/thin-layer-chromatography) - [Titration & Karl Fischer](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/titration-and-karl-fischer) - [Water for Analytical Chemistry](https://www.sigmaaldrich.com/CA/en/applications/water-purification/water-analytical-chemistry) - [Wet Chemical Analysis](https://www.sigmaaldrich.com/CA/en/applications/analytical-chemistry/wet-chemical-analysis) - [Cell Culture & Analysis](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis) - [Cell Analysis](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis) - [Cell-based Assays](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis/cell-based-assays) - [Cell Counting & Health analysis](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis/cell-counting-and-health-analysis) - [Imaging Analysis & Live Cell Imaging](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis/imaging-analysis-and-live-cell-imaging) - [Cell Culture by Cell Type](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type) - [Mammalian Cell Culture](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/mammalian-cell-culture) - [Microbial Cell Culture](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/microbial-cell-culture) - [Plant Tissue Culture](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/plant-tissue-culture) - [Primary Cell Culture](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/primary-cell-culture) - [Stem Cell Culture](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/stem-cell-culture) - [Cell Culture by Technique](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique) - [3D Cell Culture](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/3d-cell-culture) - [Cell Culture Media Preparation](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/cell-culture-media-preparation) - [Cell Growth & Maintenance](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/cell-growth-and-maintenance) - [Transfection & Gene Editing](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/transfection-and-gene-editing) - [Cell Culture for Manufacturing](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-for-manufacturing) - [Cell Culture Troubleshooting](https://www.sigmaaldrich.com/CA/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-troubleshooting) - [Chemistry & Synthesis](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis) - [ADC & Bioconjugation](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/adc-and-bioconjugation) - [Lead Discovery](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/lead-discovery) - [Peptide Synthesis](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/peptide-synthesis) - [Protein Degradation](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/protein-degradation) - [Reaction Design & Optimization](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/reaction-design-and-optimization) - [Synthetic Methods](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods) - [C-H Functionalization](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods/ch-functionalization) - [Cross Coupling](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods/cross-coupling) - [Fluorination](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods/fluorination) - [Metathesis](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods/metathesis) - [Organic Reaction Toolbox](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods/organic-reaction-toolbox) - [Photocatalysis](https://www.sigmaaldrich.com/CA/en/applications/chemistry-and-synthesis/synthetic-methods/photocatalysis) - [Clinical & Diagnostics](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing) - [Bacteriology](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/bacteriology) - [Blood Typing](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/blood-typing) - [Clinical & Forensics Testing](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/clinical-and-forensic-testing) - [Cytology & Cytodiagnosis](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/cytology-and-microscopy) - [Diagnostic Immunohistochemistry](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/diagnostic-immunohistochemistry) - [Hematology](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/hematology) - [Histology/Histopathology](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/histology) - [IVD Manufacturing](https://www.sigmaaldrich.com/CA/en/applications/clinical-testing-and-diagnostics-manufacturing/ivd-manufacturing) - [Water for Clinical Diagnostics](https://www.sigmaaldrich.com/CA/en/applications/water-purification/water-clinical-diagnostics) - [Environmental & Cannabis Testing](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene) - [Air Sampling & Monitoring](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/air-testing) - [Cannabis Testing](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing) - [Cannabinoids & Potency](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing/cannabinoid-profiling-potency-testing) - [Pesticides & Mycotoxins](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing/pesticides-mycotoxins-in-cannabis) - [Terpenes](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing/terpenes-cannabis) - [Drinking Water Testing​](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/drinking-water-testing) - [Soil, Solid Waste, & Groundwater Testing](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/soil-solid-waste-groundwater-testing) - [Waste Water & Process Water Testing](https://www.sigmaaldrich.com/CA/en/applications/environmental-testing-and-industrial-hygiene/waste-water-and-process-water-testing) - [Food & Beverage Testing & Manufacturing](https://www.sigmaaldrich.com/CA/en/applications/food-and-beverage-testing-and-manufacturing) - [Chemical Analysis](https://www.sigmaaldrich.com/CA/en/applications/food-and-beverage-testing-and-manufacturing/chemical-analysis-for-food-and-beverage) - [Flavor & Fragrance Formulation](https://www.sigmaaldrich.com/CA/en/applications/food-and-beverage-testing-and-manufacturing/flavor-and-fragrance-formulation) - [Microbiological Analysis](https://www.sigmaaldrich.com/CA/en/applications/food-and-beverage-testing-and-manufacturing/microbiological-analysis-for-food-and-beverage) - [Regulatory Compliance​](https://www.sigmaaldrich.com/CA/en/applications/food-and-beverage-testing-and-manufacturing/regulatory-compliance-for-food-and-beverage) - [Genomics](https://www.sigmaaldrich.com/CA/en/applications/genomics) - [Advanced Gene Editing](https://www.sigmaaldrich.com/CA/en/applications/genomics/advanced-gene-editing) - [Cloning & Expression](https://www.sigmaaldrich.com/CA/en/applications/genomics/cloning-and-expression) - [DNA & RNA Purification](https://www.sigmaaldrich.com/CA/en/applications/genomics/dna-and-rna-purification) - [Epigenetics](https://www.sigmaaldrich.com/CA/en/applications/genomics/epigenetics) - [Functional Genomics Screening](https://www.sigmaaldrich.com/CA/en/applications/genomics/functional-genomics-screening) - [Gene Expression & Silencing](https://www.sigmaaldrich.com/CA/en/applications/genomics/gene-expression-and-silencing) - [Next Gen Sequencing](https://www.sigmaaldrich.com/CA/en/applications/genomics/next-gen-sequencing) - [Nucleic Acid Gel Electrophoresis](https://www.sigmaaldrich.com/CA/en/applications/genomics/nucleic-acid-gel-electrophoresis) - [Nucleic Acid Labeling & Detection](https://www.sigmaaldrich.com/CA/en/applications/genomics/nucleic-acid-labeling-and-detection) - [PCR](https://www.sigmaaldrich.com/CA/en/applications/genomics/pcr) - [qPCR](https://www.sigmaaldrich.com/CA/en/applications/genomics/qpcr) - [Sequencing](https://www.sigmaaldrich.com/CA/en/applications/genomics/sequencing) - [Materials Science & Engineering](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering) - [3D Bioprinting](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/3d-bioprinting) - [3D Printing](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/3d-printing) - [Batteries, Supercapacitors, Fuel Cells](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/batteries-supercapacitors-and-fuel-cells) - [Bioelectronics](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/bioelectronics) - [Biosensors & Bioimaging](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/biosensors-and-bioimaging) - [Chemical Vapor Deposition](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/chemical-vapor-deposition) - [Contact Lens & Dental Manufacturing](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/contact-lens-and-dental-manufacturing) - [Drug Delivery](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/drug-delivery) - [Electron Microscopy](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/electron-microscopy) - [Microelectronics & Nanoelectronics](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/microelectronics-and-nanoelectronics) - [Nanoparticle & Microparticle Synthesis](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/nanoparticle-and-microparticle-synthesis) - [Organic Electronics](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/organic-electronics) - [Photovoltaics & Solar Cells](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/photovoltaics-and-solar-cells) - [Polymer Synthesis](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/polymer-synthesis) - [Solid State Synthesis](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/solid-state-synthesis) - [Tissue Engineering](https://www.sigmaaldrich.com/CA/en/applications/materials-science-and-engineering/tissue-engineering) - [Microbiological Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing) - [Bioburden Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/bioburden-testing) - [Culture Media Preparation](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/microbial-culture-media-preparation) - [Media Fill (APS)](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/media-fills) - [Microbial Water Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/microbial-water-testing) - [Mycoplasma Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/mycoplasma-testing) - [Pathogen & Spoilage Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/pathogen-and-spoilage-testing) - [Pyrogen Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/pyrogen-testing) - [Sterility Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/sterility-testing) - [Surface & Personnel Testing](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/surface-and-personnel-testing) - [Viable Air Monitoring](https://www.sigmaaldrich.com/CA/en/applications/microbiological-testing/viable-air-monitoring) - [mAbs Development & Manufacturing](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies) - [Antibody Drug Discovery](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/antibody-drug-discovery) - [Lead Selection & Optimization](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/antibody-drug-discovery/lead-discovery) - [Preclinical Development](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/antibody-drug-discovery/preclinical-development) - [Target Discovery](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/antibody-drug-discovery/target-discovery) - [Characterization & Quality Control](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/characterization-and-quality-control) - [Aggregate Analysis](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/characterization-and-quality-control/aggregate-analysis) - [Intact Mass Analysis](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/characterization-and-quality-control/intact-mass-analysis) - [Peptide Mapping](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/characterization-and-quality-control/peptide-mapping) - [Post-Translational Modification](https://www.sigmaaldrich.com/CA/en/integrated-offerings/monoclonal-antibodies/characterization-and-quality-control/post-translational-modification-analysis) - 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