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Merck

L4919

Sigma-Aldrich

Lisozima from chicken egg white

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

Sinónimos:

Mucopéptido N-acetilmuramoilhidrolasa, Muramidasa

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About This Item

Número de CAS:
Comisión internacional de enzimas:
EC Number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54

biological source

chicken egg white

Quality Level

grade

for molecular biology

product line

BioUltra

assay

≥98% (SDS-PAGE)

form

lyophilized powder

specific activity

≥40,000 units/mg protein

mol wt

single-chain 14.3 kDa

composition

Protein, ≥90%

technique(s)

cell based assay: suitable

suitability

suitable for cell lysis

application(s)

cell analysis

storage temp.

−20°C

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General description

Lysozyme is abundantly found in animal and plant kingdoms. It is a natural food preservative and also found to be present in specific bacterial cell walls. Lysozyme is usually present in tears, milk, urine and saliva.

Application

Lysozyme from chicken egg white has been used:
  • in dielectric spectroscopy studies of dynamics of protein
  • as a control to measure the human lysozyme activity
  • as a supplement in soaking solution to treat lenses

La enzima rompe las paredes celulares de las bacterias; se utiliza para preparar esferoplastos.

Biochem/physiol Actions

La lisozima hidroliza los enlaces β(1→4) entre los restos del ácido N-acetilmurámico y los restos de N-acetil-D-glucosamina en el peptidoglucano y entre los residuos de N-acetil-D-glucosamina en la quitodextrina. Las células grampositivas son bastante sensibles a esta hidrólisis, ya que sus paredes celulares tienen una elevada proporción de peptidoglucanos. Las bacterias gramnegativas son menos sensibles debido a la presencia de una membrana externa y a una menor proporción de peptidoglucanos. Sin embargo, estas células pueden ser hidrolizadas en presencia de EDTA que forma complejos con los iones metálicos en la membrana bacteriana externa.

La enzima es activa en un amplio intervalo de pH (de 6,0 a 9,0). A pH 6,2, se observa actividad máxima en un intervalo de fuerzas iónicas más amplio (de 0,02 a 0,100 M) que a pH 9,2 (de 0,01 a 0,06 M).
Lysozymes participate in the defense mechanism. It has the ability to stimulate catalysis by bringing steric stress in the substrates.

Features and Benefits

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

Unit Definition

One unit will lyse 0.6 μg of Micrococcus lysodeikticus per minute by turbidimetric detection at 600 nm when suspended in buffer at pH 6.2 at 25 °C.

Preparation Note

3× crystallized

pictograms

Health hazard

signalword

Danger

hcodes

Hazard Classifications

Resp. Sens. 1

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


Certificados de análisis (COA)

Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»

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Visite la Librería de documentos

Protein dynamics in a broad frequency range: Dielectric spectroscopy studies
Nakanishi M and Sokolov AP
Journal of Non-Crystalline Solids, 407, 478-485 (2015)
Natural Food Antimicrobial Systems (2000)
Metabolic engineering of probiotic Saccharomyces boulardii
Liu JJ, et al.
Applied and Environmental Microbiology, 82(8), 2280-2287 (2016)
Corneal cell adhesion to contact lens hydrogel materials enhanced via tear film protein deposition
Elkins CM, et al.
Testing, e105512-e105512 (2014)
Jordi van Gestel et al.
Nature ecology & evolution, 3(8), 1184-1196 (2019-07-25)
Microbes are exposed to changing environments, to which they can respond by adopting various lifestyles such as swimming, colony formation or dormancy. These lifestyles are often studied in isolation, thereby giving a fragmented view of the life cycle as a

Artículos

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

For use as a marker in SDS-PAGE; Albumin from chicken egg white, For use as a marker in SDS-PAGE; L-Lactic Dehydrogenase from rabbit muscle, Type XI, lyophilized powder, 600-1,200 units/mg protein

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

Protocolos

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

GenElute Bacterial Genomic DNA Kit protocol describes a simple and convenient way for the isolation of pure genomic DNA from bacteria.

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