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G Proteins (Heterotrimeric)
Heterotrimeric G proteins, comprising α, β and γ subunits, respond to extracellular signals generated by activated seven-transmembrane (7TM) receptors by modulating intracellular effector proteins such as enzymes and ion channels.
Horseradish Peroxidase (HRP) Enzymes
Discover our peroxidase from horseradish enzymes, products, substrates, and inhibitors for your ELISA, immunoassay, and protein application needs.
Coenzyme A
Enzyme Reagent Coenzyme A (CoA, CoASH or HSCoA) is the key cofactor in first step of the TCA cycle, responsible for transferring the acetyl group from pyruvate oxidation to oxaloacetate yielding citrate. Available through Sigma-Aldrich online.
Decorin is a small proteoglycan, which has been found associated with collagen fibrils in all connective tissues. In the skeletal system it is found primarily in the extracellular matrix of articular cartilage, which covers the surface of adult bones in
Cholesterol Esterification
Cholesterol undergoes esterification to improve transport. Cholesterol esters are more easily packaged into the interior of lipoproteins - increasing the quantity that can be readily transported in the blood stream.
Drug Conjugate Analysis using β-Glucuronidases
Drug conjugate analysis and the enzymatic hydrolysis of glucuronides
Dipeptidyl Peptidase IV
Native DPPIV is a ubiquitous type II transmembrane glycoprotein and a serine protease of the S9 prolyl-oligopeptidase family. In vivo, it is synthesized with a signal peptide which functions as the membrane anchoring domain.
Nuclear Receptors (PPARs)
Peroxisome proliferator activated receptors (PPARs) are members of the nuclear hormone receptor superfamily of ligand-activated transcription factors that are related to retinoid, steroid and thyroid hormone receptors.
Glycobiology - Carbohydrate Enzymes and Proteins
Explore our complex carbohydrate proteins, enzyme products and kits for investigating oligosaccharides, polysaccharides, and numerous additional aspects of your carbohydrate workflow.
Cyclic nucleotide phosphodiesterases (PDEs) catalyze the hydrolysis of cAMP and/or cGMP. There are 11 different mammalian PDE families.
Protein Kinase C (PKC)
Protein kinase C (PKC) is an AGC kinase that phosphorylates serine and threonine residues in many target proteins.
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Phospholipase C
The hydrolysis of a minor membrane phospholipid, phosphatidylinositol 4,5-bisphosphate (PIP2) by a specific phospholipase C (PLC) is one of the earliest key events in the regulation of various cell functions by more than 100 extracellular signaling molecules.
Enzymes for Alternative Energy Research
We are committed to help unlock the today’s challenge of releasing the energy of glucose that nature has cleverly locked into lignocellulosic biomass. To the untrained eye, starch and cellulose structures appear almost identical. Yet the barriers between cellulosic biomass
Fibrinogen is a ~340 kDa glycoprotein synthesised in the liver. It is a hexamer composed of pairs of three peptide chains (α, β, and γ). Fibrinogen is an acute phase protein that is part of the coagulation cascade of
Enzymatic Method for Determining Branched Chain Amino Acids (BCAA Assay)
Assay protocol for the colorimetric detection of Branched Chain Amino Acids (BCAA) in biological samples using the alanine assay kit.
HMG-CoA Reductase (HMGR) Assay Kit
3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) is a transmembrane glycoprotein, located on the endoplasmic reticulum.
While aprotinin and bovine pancreatic trypsin inhibitor (BPTI) are the same protein sequence, the term aprotinin is typically used when describing the protein derived from bovine lung.
Enzyme Commission Numbers
Complete List of Enzyme Commission Numbers for metabolics research.
Tubulin is the major building block of microtubules. This intracellular cylindrical filamentous structure is present in almost all eukaryotic cells.
How to Work with Enzymes Supplied as Ammonium Sulfate Suspensions
Instructions for working with enzymes supplied as ammonium sulfate suspensions
Enzymatic Assay of Cathepsin B
Cathepsin B is a lysosomal cysteine proteinase with broad specificity. This protocol uses Nα–CBZ–Arg–Arg–7–amido–4–methylcoumarin as the substrate for fluorometric detection of Cathepsin B activity.
Neurotensin Receptors
Neurotensin is a 13 amino acid regulatory peptide found mainly in gut and brain. Intestinal neurotensin is produced by a discrete population of endocrine cells (N cells) scattered throughout the jejuno-ileal mucosa.
Mucins, Glycosylated Proteins, Properties & Diagram
Mucins are a diverse family of densely glycosylated proteins. Mucin domains within the protein core are rich in threonine, serine and hydroxyproline enabling post-translational O-glycosylation.
Bioluminescent Firefly Luciferase Assays
Firefly luciferase is a widely used bioluminescent reporter for studying gene regulation and function. It is a very sensitive genetic reporter due to the absence of endogenous luciferase activity in mammalian cells or tissues.
Compound Library Screening with LOPAC®1280 Small Molecules
Learn about compound library screening and explore our compound libraries, including our Library of Pharmacologically Active Compounds (LOPAC®1280) portfolio to experience the gold-standard collection of biologically annotated, ready-to-screen compounds.
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Phospholipase D
Phosphatidylcholine (PC)-specific phospholipase D (PLD) enzymes catalyze the hydrolysis of PC to generate choline and phosphatidic acid. These enzymes belong to a superfamily of phosphatidyltransferases with a characteristic unique duplicated catalytic domain motif, the PLD or " HKD"