We were trying to use this as a protein standard and found it to be a heterogeneous mess. Not sure what all is in here, but its a lot more than betagalactosidase
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G6008
β-Galactosidase from Escherichia coli
Grade VI, lyophilized powder, ≥250 units/mg protein
β-Galactosidase from Escherichia coli
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Synonim(y):
β-
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| Do Państwa/SKU | Dostępność | Cena netto |
|---|---|---|
1000 units | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 428,00 zł |
5000 units | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 1250,00 zł |
10000 units | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 2150,00 zł |
Informacje o tej pozycji
Numer CAS:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-864-1
MDL number:
Specific activity:
≥250 units/mg protein
Biological source:
Escherichia coli
428,00 zł
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Pomoc techniczna
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Pozwól nam pomócbiological source
Escherichia coli
Quality Segment
type
Grade VI
form
lyophilized powder
specific activity
≥250 units/mg protein
mol wt
465 kDa
does not contain
BSA as extender
composition
Protein, ≥50% biuret
shipped in
wet ice
storage temp.
−20°C
General description
β-Galactosidase is a tetramer consisting of four equal subunits of 135,000 Da each. It is a sulfhydryl containing enzyme, with 19 cysteine residues per subunit.[1]
Tetramer molecular weight 465 kDa (subunits 116.3 kDa each)
Application
β-Galactosidase is conjugated to an antibody that specifically recognizes a target molecule (enzyme immunoassay or EIA).PMID 774986 β-Galactosidase is also used as a reporter enzyme to monitor the level of gene expression of a promoter.PMID 8297011
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.
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[2].
Physical form
Partially purified; contains Tris buffer salts, magnesium chloride, DL-dithiothreitol and 2-mercaptoethanol
Other Notes
One unit will hydrolyze 1.0 μmole of o-nitrophenyl β-D -galactoside to o-nitrophenol and D -galactose per min at pH 7.3 at 37 °C.
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Ta pozycja | |||
|---|---|---|---|
| description Grade VI, lyophilized powder, ≥250 units/mg protein | description Grade VIII, lyophilized powder, ≥500 units/mg protein | description lyophilized powder, ≥500 units/mg protein | description suitable for enzyme immunoassay, lyophilized, powder, ~140 U/mg |
| biological source Escherichia coli | biological source - | biological source - | biological source - |
| specific activity ≥250 units/mg protein | specific activity ≥500 units/mg protein | specific activity ≥500 units/mg protein | specific activity ~140 U/mg |
| form lyophilized powder | form lyophilized powder | form lyophilized powder | form powder |
| mol wt 465 kDa | mol wt 465 kDa | mol wt 465 kDa | mol wt Mr ~135000 |
| shipped in wet ice | shipped in - | shipped in - | shipped in wet ice |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. −20°C |
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Klasa składowania
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
signalword
Danger
hcodes
pcodes
Hazard Classifications
Resp. Sens. 1
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