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Wichtige Dokumente
C1403
Cholesterin-Esterase aus Pseudomonas sp.
lyophilized powder, ≥200,000 units/g protein
Synonym(e):
Cholesterin-Esterase aus Pseudomonas fluorescens, Sterolester-acylhydrolase
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About This Item
Empfohlene Produkte
Form
lyophilized powder
Qualitätsniveau
Spezifische Aktivität
≥200,000 units/g protein
Mol-Gew.
~300 kDa
Zusammensetzung
protein, ≥40% biuret
Lagertemp.
−20°C
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Anwendung
This enzyme is useful for enzymatic determination of total cholesterol when coupled with cholesterol oxidase in clinical analysis.
Biochem./physiol. Wirkung
Cholesterol esterase (CE) is a reversible enzyme that can hydrolyze or synthesize fatty acid esters of cholesterol and other sterols. Hydrolysis of water insoluble long chain fatty acid esters requires bile salt activation. Hydrolysis of water soluble esters of short chain fatty acids and lysophospholipids does not require activation by bile salts. It also hydrolyzes tri-, di-, and mono-acylglycerols, phospholipids, lysophospholipids, and ceramide. The enzyme may have multiple functions in lipid and lipoprotein metabolism, and atherosclerosis.
Physikalische Eigenschaften
Stability: Stable at –20°C for at least one year
Isoelectric point: 5.9 ± 0.1
Michaelis constants: 5.4 x 10‾5M (Linoleate), 6.6 x 10‾5M (Oleate)
3.7 x 10‾5M (Linolenate), 1.5 x 10‾4M (Palmitate)
1.2 x 10‾4M (Myristate), 2.3 x 10‾5M (Stearate)
Inhibitors: Hg++, Ag+, ionic detergents
Optimum pH: 7.0 − 9.0
Optimum temp: 40°C
pH Stability: pH 5.0 − 9.0 (25°C, 24hr)
Thermal stability: Below 55°C (pH 7.5, 10min)
Isoelectric point: 5.9 ± 0.1
Michaelis constants: 5.4 x 10‾5M (Linoleate), 6.6 x 10‾5M (Oleate)
3.7 x 10‾5M (Linolenate), 1.5 x 10‾4M (Palmitate)
1.2 x 10‾4M (Myristate), 2.3 x 10‾5M (Stearate)
Inhibitors: Hg++, Ag+, ionic detergents
Optimum pH: 7.0 − 9.0
Optimum temp: 40°C
pH Stability: pH 5.0 − 9.0 (25°C, 24hr)
Thermal stability: Below 55°C (pH 7.5, 10min)
Einheitendefinition
One unit will hydrolyze 1.0 μmole of cholesteryl oleate to cholesterol and oleic acid per min at pH 7.0 at 37 °C in the presence of taurocholate.
Signalwort
Danger
H-Sätze
P-Sätze
Gefahreneinstufungen
Resp. Sens. 1
Lagerklassenschlüssel
11 - Combustible Solids
WGK
WGK 1
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
Persönliche Schutzausrüstung
Eyeshields, Gloves, type N95 (US)
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