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
• Numer EC enzymu: 3.2.1.17 (BRENDA, IUBMB)
• Numer WE: 235-747-3
• Numer MDL: MFCD00131557
• Kod UNSPSC: 12352204
• NACRES: NA.54

Właściwości

• pochodzenie biologiczne: chicken egg white
• klasa czystości: for molecular biology
• linia produktu: BioUltra
• Próba: ≥98% (SDS-PAGE)
• Postać: lyophilized powder
• aktywność właściwa: ≥40,000 units/mg protein
• masa cząsteczkowa: single-chain 14.3 kDa
• skład: Protein, ≥90%
• metody: cell based assay: suitable
• przydatność: suitable for cell lysis
• Zastosowanie: cell analysis
• temp. przechowywania: −20°C

Opis

Opis ogólny

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.

Zastosowanie

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.

Działania biochem./fizjol.

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).

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

Cechy i korzyści

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

Definicja jednostki

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.

Uwaga dotycząca przygotowania

3× crystallized

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Informacja o środkach bezpieczeństwa

• Piktogramy: GHS08
• Hasło ostrzegawcze: Danger
• Zwroty wskazujące rodzaj zagrożenia: H334
• Zwroty wskazujące środki ostrożności: P261 - P284 - P501
• Klasyfikacja zagrożeń: Resp. Sens. 1
• Kod klasy składowania: 11 - Combustible Solids
• Klasa zagrożenia wodnego (WGK): WGK 3
• Temperatura zapłonu (°F): Not applicable
• Temperatura zapłonu (°C): Not applicable
• Środki ochrony indywidualnej: Eyeshields, Gloves, type N95 (US)