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Lysozyme from chicken egg white

10 mg/mL

Mucopeptide N-acetylmuramoylhydrolase, Muramidase
CAS Number:
Enzyme Commission number:
MDL number:

Quality Level


(Ready to use solution:10 mg/mL lysozyme in 25 mM sodium acetate pH 4.5 with 50% glycerol.)

mol wt

single-chain 14.3 kDa


≥400000 units/mL
10 mg/mL

UniProt accession no.

shipped in

wet ice

storage temp.


Gene Information

chicken ... LYZ(396218)

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General description

Lysosyme is an enzyme found in egg white that breaks down the cell walls in bacteria enhancing the efficiency of DNA and protein extraction.


Enzyme breaks down the cell walls of bacteria; used to prepare spheroplasts.
Suitable for the purification of both DNA and protein from bacteria.

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).


Tested for suitability with CelLytic B in protein extraction from bacteria.

Physical form

Solution in 50% glycerol, 25 mM Sodium Acetate

Legal Information

CelLytic is a trademark of Sigma-Aldrich Co. LLC


Health hazard

Signal Word


Hazard Statements

Precautionary Statements

Hazard Classifications

Resp. Sens. 1

Storage Class Code

10 - Combustible liquids

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Phase-sensitive spatially-modulated surface plasmon resonance polarimetry for detection of biomolecular interactions
Patskovsky,S et al.
Sens. Actuators, 133 (2), 628-631 (2008)
Michael G Drage et al.
Cellular immunology, 258(1), 29-37 (2009-04-14)
Mycobacterium tuberculosis (Mtb) signals through Toll-like receptor 2 (TLR2) to regulate antigen presenting cells (APCs). Mtb lipoproteins, including LpqH, LprA, LprG and PhoS1, are TLR2 agonists, but their co-receptor requirements are unknown. We studied Mtb lipoprotein-induced responses in TLR2(-/-), TLR1(-/-)...
Daimon P Simmons et al.
Journal of immunology (Baltimore, Md. : 1950), 185(4), 2405-2415 (2010-07-28)
Dendritic cells (DCs) cross process exogenous Ags and present them by class I MHC (MHC-I) molecules to CD8(+) T cells specific for Ags from viruses and bacteria such as Mycobacterium tuberculosis. Unmethylated CpG DNA signals through TLR9 to induce type...
P F Zabrodskiĭ et al.
Eksperimental'naia i klinicheskaia farmakologiia, 75(11), 19-21 (2013-01-18)
It is established in experiments on noninbred rats that the use of imunofan (20 mg/kg daily) and polyoxidonium (150 mg/kg daily) for 7 days on the background of chronic intoxication with organophosphorus agent VX (0.01 LD50, single daily treatment for...
Mariela G Del Giudice et al.
Infection and immunity, 81(3), 956-964 (2013-01-16)
Secretion of proteins in Gram-negative bacteria is a high-energy-consuming process that requires translocation across two membranes and a periplasmic space composed of a mesh-like layer, the peptidoglycan. To achieve this, bacteria have evolved complex secretion systems that cross these barriers...


Enzymatic Assay of Lysozyme (EC

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

Plasmid DNA Preparation

Preparation of Plasmid DNA by Alkaline Lysis with SDS: Maxipreparation between Cold Spring Harbor Laboratory Press and our research team.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

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