N1252

Sigma-Aldrich

4-Nitrophenyl β-D-galacto­pyran­oside

≥98% (enzymatic)

Synonym(s):
p-Nitrophenyl β-D-galacto­pyran­oside
Empirical Formula (Hill Notation):
C12H15NO8
CAS Number:
Molecular Weight:
301.25
Beilstein/REAXYS Number:
92213
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.32

Quality Level

assay

≥98% (TLC)
≥98% (enzymatic)

form

powder

solubility

water: 10  mg/mL, clear, colorless to very faintly green

storage temp.

−20°C

SMILES string

OC[C@H]1O[C@@H](Oc2ccc(cc2)[N+]([O-])=O)[C@H](O)[C@@H](O)[C@H]1O

InChI

1S/C12H15NO8/c14-5-8-9(15)10(16)11(17)12(21-8)20-7-3-1-6(2-4-7)13(18)19/h1-4,8-12,14-17H,5H2/t8-,9+,10+,11-,12-/m1/s1

InChI key

IFBHRQDFSNCLOZ-YBXAARCKSA-N

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Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Xuesen Hu et al.
Archiv der Pharmazie, 344(2), 71-77 (2011-02-04)
This experiment was designed to synthesize 18 kinds of polyhydroxybenzophenones by using Friedel-Crafts reaction, and to measure the inhibitory activity on α-glucosidase with p-nitrophenyl-β-D-galactopyranoside (PNPG) as a substrate. Here, acarbose (IC(50)  = 1674.75 µmol L(-1) ) was used as the reference...
Reuben E Huber et al.
Biochemistry, 42(6), 1796-1803 (2003-02-13)
Trp-999 is a key residue for the action of beta-galactosidases (Escherichia coli). Several site specific substitutions (Phe, Gly, Tyr, Leu) for Trp-999 were made. Each substitution caused greatly decreased affinities for substrates and inhibitors that bind in the "shallow" mode...
Irina Smirnova et al.
Proceedings of the National Academy of Sciences of the United States of America, 108(37), 15147-15151 (2011-09-08)
The lactose permease (LacY) catalyzes galactoside/H(+) symport via an alternating access mechanism in which sugar- and H(+)-binding sites in the middle of the molecule are alternatively exposed to either side of the membrane by opening and closing of inward- and...
Hala Nehme et al.
Analytica chimica acta, 722, 127-135 (2012-03-27)
Enzymes are often quantified by measuring their biological activity. Capillary electrophoresis is gaining its position in this field due to the ongoing trend to miniaturize biochemical assays. The aim of this work was to compare pre-capillary (off-line) and in-capillary electrophoresis...
Seçil Onal et al.
Artificial cells, blood substitutes, and immobilization biotechnology, 31(3), 339-355 (2003-08-09)
alpha-Galactosidase (alpha-D-galactoside galactohydrolase, EC 3.2.1.22) from watermelon was covalently immobilized on chitin. The immobilized alpha-galactosidase exhibited an activity of 0.61 U per g of carrier and an activity yield of 67%. The properties of free and immobilized alpha-galactosidase were also...

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