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L6876

Sigma-Aldrich

Lysozyme from chicken egg white

lyophilized powder, protein ≥90 %, ≥40,000 units/mg protein

Synonym(s):
Mucopeptide N-acetylmuramoylhydrolase, Muramidase
CAS Number:
Enzyme Commission number:
EC Number:
MDL number:

Quality Level

form

lyophilized powder

specific activity

≥40,000 units/mg protein

mol wt

single-chain 14.3 kDa

composition

protein, ≥90%

UniProt accession no.

shipped in

wet ice

storage temp.

−20°C

Gene Information

chicken ... LYZ(396218)

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Application

Lysozyme from chicken egg white has been used for the extraction of genomic DNA from bacterial cells. It has been used as an external standard for MALDI-TOF (matrix assisted laser desorption ionization-time of flight) mass analysis.
Enzyme breaks down the cell walls of bacteria; used to prepare spheroplasts.

Packaging

1, 5, 10, 25, 100 g in poly bottle

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).

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).

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Precautionary Statements

Hazard Classifications

Resp. Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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Articles

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A key resource feature at our Enzyme Explorer section of biochemicals is "Enzymes for Carbohydrate Analysis and Digestion." Offering kits, reagents, analysis, lists of enzymes related to PTM and carbohydrate metabolism.

HPLC Analysis of Proteins on TSKgel® BioAssist S

Separation of Ribonuclease A from bovine pancreas, Type I-A, powder, ≥60% RNase A basis (SDS-PAGE), ≥50 Kunitz units/mg protein; α-Chymotrypsinogen A from bovine pancreas, essentially salt-free, lyophilized powder; Cytochrome c from bovine heart, ≥95% based on Mol. Wt. 12,327 basis; Lysozyme from chicken egg white, lyophilized powder, protein ≥90 %, ≥40,000 units/mg protein

HPLC Analysis of Proteins on Proteomix® SCX-NP5

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Protocols

Enzymatic Assay of Lysozyme (EC 3.2.1.17)

This enzymatic rate determination may be used for Lysozyme products. It is not to be used to assay recombinant or insoluble Lysozyme on agarose.

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