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L7651

Sigma-Aldrich

Lysozym aus Hühnereiweiss

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

Synonym(e):

Mucopeptid-N-Acetylmuramoylhydrolase, Muramidase

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About This Item

CAS-Nummer:
12650-88-3
EC-Nummer:
3.2.1.17 (BRENDA, IUBMB)
EG-Nummer:
235-747-3
MDL-Nummer:
MFCD00131557
UNSPSC-Code:
12352204

Qualität

for molecular biology

Form

lyophilized powder

Spezifische Aktivität

≥40,000 units/mg protein

Mol-Gew.

single-chain 14.3 kDa

Zusammensetzung

protein, ≥90%

UniProt-Hinterlegungsnummer

P00698

Lagertemp.

−20°C

Angaben zum Gen

chicken ... LYZ(396218)

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Anwendung

Enzym bricht die Zellwände von Bakterien, wird verwendet um Sphäroplasten vorzubereiten.
Lysozyme hydrolyzes the β-1,4 linkages between N-acetylmuramic acid and N-acetylglucosamine, a polysaccharide backbone of peptidoglycans in the cell wall structure of many microorganisms. This is particularly useful for lysing Gram-positive and Gram-negative bacteria for subsequent nucleic acid extraction.

Biochem./physiol. Wirkung

Lysozym hydrolysiert β(1→4)-Bindungen zwischen N-Acetylmuraminsäure und N-Acetyl-D-Glucosamin-Resten in Peptidoglycan und zwischen N-Acetyl-D-Glucosamin-Resten in Chitodextrin. Gram-positive Zellen sind sehr anfällig für diese Hydrolyse, da ihre Zellwände einen hohen Peptidoglycan-Anteil haben. Gram-negative Bakterien sind auf Grund einer äußeren Membran und eines geringeren Peptidoglycan-Anteils weniger anfällig. Allerdings können diese Zellen in Gegenwart von EDTA, welches Chelate mit Metallionen in der äußeren bakteriellen Membran bildet, hydrolysiert werden.

Das Enzym ist über einen breiten pH-Bereich aktiv (6.0 bis 9.0). Bei pH 6.2 wird eine maximale Aktivität über einen größeren Ionenstärken-Bereich (0.02 bis 0.100 M), verglichen mit pH 9,2 (0.01 bis 0.06 M), beobachtet.

Leistungsmerkmale und Vorteile

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

Einheitendefinition

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).

Physikalische Form

Lyophilized powder, essentially salt-free

Angaben zur Herstellung

3× crystallized

Ersetzt durch

Produkt-Nr.
Beschreibung
Preisangaben

Substrat

Produkt-Nr.
Beschreibung
Preisangaben

Piktogramme

Health hazard
GHS08

Signalwort

Danger

H-Sätze

H334

Gefahreneinstufungen

Resp. Sens. 1

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 3

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable

Persönliche Schutzausrüstung

Eyeshields, Gloves, type N95 (US)

Analysenzertifikate (COA)

Suchen Sie nach Analysenzertifikate (COA), indem Sie die Lot-/Chargennummer des Produkts eingeben. Lot- und Chargennummern sind auf dem Produktetikett hinter den Wörtern ‘Lot’ oder ‘Batch’ (Lot oder Charge) zu finden.

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How can I reconstitute Lysozyme from chicken egg white, Product L7651?

    For E. coli cell lysis, use a freshly prepared lysozyme solution (10 mg/mL) in 10 mM Tris-HCl, pH 8.0. The product is also soluble in water (10 mg/mL) yielding a clear to slightly hazy colorless solution.

  4. How stable are solutions of Lysozyme from chicken egg white, Product L7651?

    Aqueous solutions should retain activity for at least one month when stored between 2-8 °C.

  5. Is Lysozyme from chicken egg white, Product L7651, suitable for bacterial lysis prior to DNA purification?

    Each lot is verified to be suitable for use as a lysing agent in purifying plasmid DNA from E. coli. You can also use this product in combination with the GenElute™ Bacterial Genomic DNA Kit (Product No. NA2100) to purify genomic DNA from Gram-positive bacteria.

  6. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  7. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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