Which is the C4 epimer( 差向异构体 )of D-glucose ?A.D-(+)-galactose( 半乳糖 )B.D-(+)-mannose( 甘露糖 )C.D-(+)-fructose( 果糖 )D.D-(-)-ribose( 核糖 )的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一
the enantiomer of the already known imidazolo-sugar 4 .doi:10.1016/S0040-4039(99)01003-5Hervé SiendtThéophile TschamberJacques StreithTetrahedron LettersSiendt H.; Tschamber T.; Streith J. Improved double epimerisation of (D)-glucose into (D)-gulose and the synthesis of (D)-xylo-...
(Chemistry) either of two optical isomers differing from each other only in the configuration of the atoms about one asymmetric carbon atom n (Chemistry) either of two isomers differentiated by the position of the atoms around a single asymmetric carbon atom ...
The best studied SDR with epimerase activity is UDP-galactose 4-epimerase (GALE), catalysing the interconver- sion between UDP-glucose and UDP-galactose within the Leloir pathway28,29,36. GALE contains a tightly bound NAD+ molecule, which stays attached to the enzyme during the reaction cycle ...
YIM 66142 was cultivated in 250 mL Erlenmeyer flasks containing 50 mL of seed medium (0.4% yeast extract, 0.4% glucose, 0.5% malt extract, decavitamin, 0.03% alanine, pH 7.2). The flasks were shaken at 300 r.p.m. at 28 °C for 2 days using a rotary shaker. The seed culture (10...
Mutations in the Bacillus subtilis gene that affect the activity of the uridine diphosphate (UDP)-N-acetylglucosamine (GlcNAc) 4-epimerase (EC 5.1.3.7) were shown to map to galE, the structural gene of the UDP-glucose (Glc) 4-epimerase (EC 5.1.3.2). This genetic evidence that the same ...
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The prepn. of epimer-free sugar alcohols (I) chosen from xylitol, sorbitol (D-glucitol), 4-O-beta-D-galactopyranosyl- D-glucitol and 4-O-alpha-D-gluco -pyranosyl-D-sorbitol comprises continuous catalytic hydrogenation of the corresp. sugar (II), -xylose, alpha-D-glucose, 4-O-beta-D-...
-Lentiginosine, Its 8a-Epimer and Dihydroxylated Pyrrolizidine Alkaloid from D-Glucose. Tetrahedron . 2006Vinod D,Chaudhari K S,Ajish K,et al.Synthesis of (L)-lentiginosine, its 8a-epimer and dihydroxylated pyrrolizidine alkaloid from D-glucose. Tetrahedron . 2006...
-Lentiginosine, Its 8a-Epimer and Dihydroxylated Pyrrolizidine Alkaloid from D-Glucose. Tetrahedron . 2006Vinod D,Chaudhari K S,Ajish K,et al.Synthesis of (L)-lentiginosine, its 8a-epimer and dihydroxylated pyrrolizidine alkaloid from D-glucose. Tetrahedron . 2006...