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Enzymes for Research, Diagnostic and Industrial Use

Maltose Phosphorylase from E. coli, Recombinant


Cat No.
NATE-1250
Description
Maltose phosphorylase (MP) is a dimeric enzyme that catalyzes maltose and inorganic phosphate into β-D-glucose-1-phosphate and glucose.
Abbr
MP, Recombinant (E. coli)
Alias
MP
Source
E. coli
Species
E. coli
Appearance
White lyophilizate
Enzyme Commission Number
EC 2.4.1.8
Activity
> 10 U/mg lyophilizate
CAS No.
9030-19-7
Contaminants
α-amylase < 5.0 x 10^-3% α-glucosidase < 5.0 x 10^-2% NADPH oxidase < 5.0 x 10^-2%
Molecular Weight
ca. 220 kDa
pH Stability
5.5–8.0
Michaelis Constant
1.9 x 10^-3 M (maltose) 3.4 x 10^-3 M (phosphate) 8.3 x 10^-3 M (arsenate)
Structure
2 subunits of 90 kDa (SDS-PAGE)
Unit Definition
One unit (U) is defined as the amount of enzyme which produces 1 μmol of D-glucose per min at 30°C and pH 7.0.
Optimum pH
6.5–7.5
Optimum temperature
45–50°C
Thermal stability
below 55°C
Stability
Stability (liquid form) stable at 37°C for at least one week Stability (powder form) stable at 30°C for at least four weeks
Storage
at -20°C
Stabilizers
Lactose
Inhibitors
Hg2+, Ag+, Zn2+, Cu2+
Synonyms
maltose phosphorylase; maltose:phosphate 1-β-D-glucosyltransferase; EC 2.4.1.8; 9030-19-7; MP
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