15718
D -(+)-麦芽糖 一水合物
别名:
4-O-α-D-吡喃葡糖基-D-葡萄糖, 麦芽糖
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关于此项目
经验公式（希尔记法）:
C12H22O11 · H2O
化学文摘社编号:
分子量:
360.31
EC Number:
200-716-5
UNSPSC Code:
12352201
PubChem Substance ID:
Beilstein/REAXYS Number:
93798
MDL number:
InChI key
HBDJFVFTHLOSDW-DNDLZOGFSA-N
InChI
1S/C12H22O11.H2O/c13-1-4(16)7(18)11(5(17)2-14)23-12-10(21)9(20)8(19)6(3-15)22-12;/h1,4-12,14-21H,2-3H2;1H2/t4-,5+,6+,7+,8+,9-,10+,11+,12+;/m0./s1
SMILES string
O.OC[C@@H](O)[C@@H](O[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O)[C@H](O)[C@@H](O)C=O
optical activity
[α]20/D +137±2°, c = 10% in H2O (calc.of H2O free subst.)
impurities
≤0.001% heavy metals (as Pb), 5-6% water (Karl Fischer)
ign. residue
≤0.05% (as SO4)
solubility
H2O: soluble 180 g/L at 20 °C
anion traces
chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg
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Application
D-Maltose has been used for preparing Diamond′s modified TYM medium which is utilized for studying the pharmacodynamic impacts of metronidazole on Trichomonas vaginalis by using time-kill assay. It has also been used as a substrate for the identification, differentiation and characterization of enzymes such as maltase(s); maltose alpha-D-glucosyltransferase(s); maltose-transporting ATPase(s); maltose O-acetyltransferase(s), maltose epimerase(s) and phosphorylase(s). Further, D-Maltose has been used to study maltose-binding proteins and disaccharide transport systems. Other application of D-maltose was in disproportionation activity enzyme assays.
Biochem/physiol Actions
D-Maltose is broken down in the presence of beta-amylases to produce two molecule of glucose followed by glucose metabolism and release of energy. The malP and malQ genes in bacterial genome produce essential enzymes required for maltose metabolism. Beta-amylases are present in plants and bacteria whereas maltase present in humans breaks down the maltose in diet.
Maltose is a disaccharide containing two glucose molecules with an α(1→4) glycosidic linkage. Maltose can be derived from starch in food through the action of amylase. Maltose can be found in many food products, including beer, cereals, and pasta.
存储类别
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
法规信息
新产品
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D E Nix et al.
Antimicrobial agents and chemotherapy, 39(8), 1848-1852 (1995-08-01)
The pharmacodynamic effects of metronidazole on Trichomonas vaginalis have been poorly characterized. The present in vitro study was performed to characterize the relationship between killing of trichomonads and metronidazole exposure (metronidazole concentration and time of exposure). Five laboratory strains and
B A van der Veen et al.
The Journal of biological chemistry, 276(48), 44557-44562 (2001-09-14)
Cyclodextrin-glycosyltransferases (CGTases) (EC ) preferably catalyze transglycosylation reactions with glucosyl residues as acceptor, whereas the homologous alpha-amylases catalyze hydrolysis reactions using water as acceptor. This difference in reaction specificity is most likely caused by the acceptor binding site. To investigate
B A van der Veen et al.
European journal of biochemistry, 267(3), 658-665 (2000-01-29)
Cyclodextrin glycosyltransferase (CGTase) catalyzes three transglycosylation reactions via a double displacement mechanism involving a covalent enzyme-intermediate complex (substituted-enzyme intermediate). Characterization of the three transglycosylation reactions, however, revealed that they differ in their kinetic mechanisms. Disproportionation (cleavage of an alpha-glycosidic bond
G M Gray
The Journal of nutrition, 122(1), 172-177 (1992-01-01)
Starch digestion and absorption is augmented appreciably by physical processing of grain or legume and by heating to 100 degrees C for several minutes before its ingestion. Starch, a polysaccharide composed of alpha 1,4-linked glucose units (amylose) and alpha 1,4-1,6-linked
W Boos et al.
Microbiology and molecular biology reviews : MMBR, 62(1), 204-229 (1998-04-08)
The maltose system of Escherichia coli offers an unusually rich set of enzymes, transporters, and regulators as objects of study. This system is responsible for the uptake and metabolism of glucose polymers (maltodextrins), which must be a preferred class of
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