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L4919 Sigma

Lysozyme from chicken egg white

BioUltra, lyophilized powder, ≥98% (SDS-PAGE), ≥40,000 units/mg protein

Synonym: Mucopeptide N-acetylmuramoylhydrolase, Muramidase

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Properties

Related Categories 3.2.x.x Glycosidases, 3.x.x.x Hydrolases, Biochemicals and Reagents, Enzyme Class Index, Enzymes, Inhibitors, and Substrates More...
grade   for molecular biology
product line   BioUltra
assay   ≥98% (SDS-PAGE)
form   lyophilized powder
mol wt   single-chain mol wt 14.3 kDa
composition   Protein, ≥90%
storage temp.   −20°C

Description

Application

Enzyme breaks down the cell walls of bacteria; used to prepare spheroplasts.

Features and Benefits

• Highly purified by repeated crystallization and dialysis
• Each lot is use-tested for isolation of plasmid DNA from E. coli

Packaging

1, 5 g in poly bottle

500 mg in poly bottle

Preparation Note

3× crystallized

Unit Definition

One unit will produce a ΔA450 of 0.001 per min at pH 6.24 at 25°C, using a suspension of Micrococcus lysodeikticus as substrate, in a 2.6 mL reaction mixture (1 cm light path).

Biochem/physiol Actions

Lysozyme hydrolyzes β(1→4) linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrin. Gram-positive cells are quite susceptible to this hydrolysis as their cell walls have a high proportion of peptidoglycan. Gram-negative bacteria are less susceptible due to the presence of an outer membrane and a lower proportion of peptidoglycan. However, these cells may be hydrolyzed in the presence of EDTA that chelates metal ions in the outer bacterial membrane.

The enzyme is active over a broad pH range (6.0 to 9.0). At pH 6.2, maximal activity is observed over a wider range of ionic strengths (0.02 to 0.100 M) than at pH 9.2 (0.01 to 0.06 M).

Price and Availability


Biomedical Applications
Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
OL5989000

Documents

Certificate of Analysis

Certificate of Origin

Protocols & Articles

Articles

HPLC Analysis Proteins on Proteomix® SCX-NP1.7, Demonstration of Column Stability with Repeated Injections

From our library of Articles, Sigma-Aldrich presents HPLC Analysis Proteins on Proteomix® SCX-NP1.7, Demonstration of Column Stability with Repeated Injections
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Four Low Moleculer Weight Proteins on 5μm BIOshell™ 160Å Peptide C18 Column, Comparison to Totally Porous 3 μm C18 Column

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Four Low Moleculer Weight Proteins on 5μm BIOshell™ 160Å Peptide C18 Column, Comparison to Totally Porous 3 μm C18 Column
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Lysozyme on SRT® SEC-300, 30 cm x 7.8 mm I.D., 5 μm particles

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Lysozyme on SRT® SEC-300, 30 cm x 7.8 mm I.D., 5 μm particles
Keywords: Chromatography, High performance liquid chromatography, Size-exclusion chromatography

HPLC Analysis of Peptides and Proteins on Proteomix® SCX-NP1.7, 5 cm x 4.6 mm I.D. Column

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Peptides and Proteins on Proteomix® SCX-NP1.7, 5 cm x 4.6 mm I.D. Column
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Protein Standards (1) on BIOshell™ A400 Protein C4

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Protein Standards (1) on BIOshell™ A400 Protein C4
Keywords: Chromatography, High performance liquid chromatography, Reversed-phase chromatography

HPLC Analysis of Proteins Comparing Ion Selectivity on Proteomix® SCX-NP5

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins Comparing Ion Selectivity on Proteomix® SCX-NP5
Keywords: Chromatography, High performance liquid chromatography, Ion Exchange

HPLC Analysis of Proteins Comparing Ion Selectivity on Proteomix® WCX-NP5

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins Comparing Ion Selectivity on Proteomix® WCX-NP5
Keywords: Chromatography, High performance liquid chromatography, Ion Exchange

HPLC Analysis of Proteins Demonstrating Selectivity Differences between TSKgel® Strong (SP-5PW) and Weak (CM-5PW) Cation Exchangers

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins Demonstrating Selectivity Differences between TSKgel® Strong (SP-5PW) and Weak (CM-5PW) Cation Exchangers
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins and Peptides on Proteomix® WCX, Comparison of Different Particle Sizes

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins and Peptides on Proteomix® WCX, Comparison of Different Particle Sizes
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins and Peptides on Proteomix® WCX-NP1.7 Demonstrating Lot-to-Lot Reproducibility

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins and Peptides on Proteomix® WCX-NP1.7 Demonstrating Lot-to-Lot Reproducibility
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins by Cation Exchange on Proteomix® WCX-NP5: Affect of pH

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins by Cation Exchange on Proteomix® WCX-NP5: Affect of pH
Keywords: Chromatography, High performance liquid chromatography, Ion Exchange

HPLC Analysis of Proteins by Cation Exchange on Proteomix® WCX: Affect of Particle Size

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins by Cation Exchange on Proteomix® WCX: Affect of Particle Size
Keywords: Chromatography, High performance liquid chromatography, Ion Exchange

HPLC Analysis of Proteins on Antibodix® WCX-NP10, Comparison of WCX Columns

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on Antibodix® WCX-NP10, Comparison of WCX Columns
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins on BIOshell™ A160 Peptide C18

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on BIOshell™ A160 Peptide C18
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins on BIOshell™ A400 Protein C18

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on BIOshell™ A400 Protein C18
Keywords: High performance liquid chromatography

HPLC Analysis of Proteins on Proteomix® SCX Columns, Effect of Particle Size of Resolution

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on Proteomix® SCX Columns, Effect of Particle Size of Resolution
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins on Proteomix® SCX-NP1.7, Demonstration of Lot-to-Lot Reproducibility

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on Proteomix® SCX-NP1.7, Demonstration of Lot-to-Lot Reproducibility
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins on Proteomix® SCX-NP5

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on Proteomix® SCX-NP5
Keywords: High performance liquid chromatography, Separation

HPLC Analysis of Proteins on Proteomix® WCX-NP5

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on Proteomix® WCX-NP5
Keywords: High performance liquid chromatography, Proteomics

HPLC Analysis of Proteins on TSKgel® BioAssist S, Ion Selectivity Comparison

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on TSKgel® BioAssist S, Ion Selectivity Comparison
Keywords: Chromatography, High performance liquid chromatography, Ion Exchange

HPLC Analysis of Proteins on TSKgel® BioAssist S

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on TSKgel® BioAssist S
Keywords: High performance liquid chromatography, Proteomics

HPLC Analysis of Proteins on TSKgel® Porous (Phenyl-5PW and Ether-5PW) and Non-Porous (Butyl-NPR) HIC Columns

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins on TSKgel® Porous (Phenyl-5PW and Ether-5PW) and Non-Porous (Butyl-NPR) HIC Columns
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Proteins with Different pI Values on Proteomix® SCX-NP3

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Proteins with Different pI Values on Proteomix® SCX-NP3
Keywords: Chromatography, High performance liquid chromatography

Scalability of TSKgel® Phenyl-5PW Analytical HPLC Separations to Preparative/Process Scale on Toyopearl® Phenyl-650M Resins

From our library of Articles, Sigma-Aldrich presents Scalability of TSKgel® Phenyl-5PW Analytical HPLC Separations to Preparative/Process Scale on Toyopearl® Phenyl-650M Resins
Keywords: Chromatography, High performance liquid chromatography

Protocols

Enzymatic Assay of Lysozyme (EC 3.2.1.17)

This procedure may be used for Lysozyme products. The enzymatic rate determination (A450, Light path = 1 cm) is based on the following reaction:

GenElute Bacterial Genomic DNA Kit Protocol

Sigma's GenElute™ Bacterial Genomic DNA Kit provides a simple and convenient way to isolate pure DNA from a variety of cultured bacteria. The kit contains all of the reagents needed to isolate and pu...
Keywords: AGE, Amplification, Cell disruption, Centrifugation, Degradations, Digestions, Electrophoresis, Evaporation, Gel electrophoresis, Molecular biology, Nucleic acid denaturation, Phase transitions, Polymerase chain reaction, Precipitation, Pulsed field gel electrophoresis

GenElute Bacterial Genomic DNA Kit, Experienced User Protocol

For experienced users, an abbreviated protocol is listed below. For data, images, troubleshooting and other information.

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Molecular biology

Peer-Reviewed Papers
15

References

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06693 Timestrip Plus -20 °C

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