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48274 Sigma-Aldrich

β-Galactosidase from Escherichia coli

>400 U/mg

Synonym: β-D-Galactoside galactohydrolase, Lactase

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Description

Other Notes

Same product — same quality — now Sigma-Aldrich brand

Unit Definition

1 U corresponds to the amount of enzyme which hydrolyzes 1 μmol 2-nitrophenyl-β-D-galactopyranoside (Cat. No. 73660) per minute at pH 7.8 and 37 °C

Biochem/physiol Actions

β-galactosidase cleaves lactose into its monosaccharide components, glucose and galactose. It also catalyses the transglycosylation of glucose into allolactose, the inducer of β-galactosidase, in a feedback loop.

Physical properties

Tetramer molecular weight 465 kDa (subunits 116.3 kDa each)

Price and Availability

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
LW5840000

Documents

Certificate of Analysis

Protocols & Articles

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Molecular biology

Peer-Reviewed Papers
15

References

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G5635 β-Galactosidase from Escherichia coli, Grade VIII, lyophilized powder, ≥500 units/mg protein

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