L4919

Lysozyme from chicken egg white

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

• Synonim(y): Mucopeptide N-acetylmuramoylhydrolase, Muramidase
• Numer CAS: 12650-88-3
• UNSPSC Code: 12352204
• NACRES: NA.54
• EC Number: 235-747-3
• MDL number: MFCD00131557
• Numer WE: 3.2.1.17 (BRENDA, IUBMB)
• eCl@ss: 32150313
• Specific activity: ≥40,000 units/mg protein
• Assay: ≥98% (SDS-PAGE)
• Biological source: chicken egg white

Właściwości

• biological source: chicken egg white
• Quality Segment: 200
• grade: 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
• input: bacteria and yeast sample(s)
• optimum pH: 6.2
• suitability: suitable for cell lysis
• application(s): cell analysis
• storage temp.: −20°C

Opis

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.

Substrate Specificity

Hydrolysis of (1→4)-β-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins

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

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

Biochem/physiol Actions

Lysozymes participate in the defense mechanism. It has the ability to stimulate catalysis by bringing steric stress in the substrates.

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).

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.

Features and Benefits

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

Preparation Note

3× crystallized

Other Notes

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.

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Informacja o środkach bezpieczeństwa

• Piktogramy: GHS08
• Słowo ostrzegawcze: Danger
• Kody zagrożeń: H334
• Ostrzeżenia: P261 - P284 - P501
• Hazard Classifications: Resp. Sens. 1
• Klasa składowania: 11 - Combustible Solids
• WGK: WGK 3
• Temperatura zapłonu (°F): Not applicable
• Temperatura zapłonu (°C): Not applicable
• PPE (środki ochrony indywidualnej): Eyeshields, Gloves, type N95 (US)