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(3S,4S,5R)-1,3,4,5,6-Pentahydroxyhexan-2-one Sale

(Synonyms: D-塔格糖; D-(-)-Tagatose) 目录号 : GC38283

D-Tagatose is an isomer of fructose and is used as a sweetener in beverages, yogurt, creams, and dietetic candy.

(3S,4S,5R)-1,3,4,5,6-Pentahydroxyhexan-2-one Chemical Structure

Cas No.:87-81-0

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100mg
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Sample solution is provided at 25 µL, 10mM.

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产品描述

D-Tagatose is an isomer of fructose and is used as a sweetener in beverages, yogurt, creams, and dietetic candy.

Chemical Properties

Cas No. 87-81-0 SDF
别名 D-塔格糖; D-(-)-Tagatose
Canonical SMILES OCC([C@@H](O)[C@@H](O)[C@H](O)CO)=O
分子式 C6H12O6 分子量 180.16
溶解度 DMSO: 125 mg/mL (693.83 mM) 储存条件 Store at -20°C
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溶解性数据

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1 mg 5 mg 10 mg
1 mM 5.5506 mL 27.7531 mL 55.5062 mL
5 mM 1.1101 mL 5.5506 mL 11.1012 mL
10 mM 0.5551 mL 2.7753 mL 5.5506 mL
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Research Update

Enantioselective transformation of alpha-hexachlorocyclohexane by the dehydrochlorinases LinA1 and LinA2 from the soil bacterium Sphingomonas paucimobilis B90A

Appl Environ Microbiol 2005 Dec;71(12):8514-8.PMID:16332842DOI:PMC1317435

Sphingomonas paucimobilis B90A contains two variants, LinA1 and LinA2, of a dehydrochlorinase that catalyzes the first and second steps in the metabolism of hexachlorocyclohexanes (R. Kumari, S. Subudhi, M. Suar, G. Dhingra, V. Raina, C. Dogra, S. Lal, J. R. van der Meer, C. Holliger, and R. Lal, Appl. Environ. Microbiol. 68:6021-6028, 2002). On the amino acid level, LinA1 and LinA2 were 88% identical to each other, and LinA2 was 100% identical to LinA of S. paucimobilis UT26. Incubation of chiral alpha-hexachlorocyclohexane (alpha-HCH) with Escherichia coli BL21 expressing functional LinA1 and LinA2 S-glutathione transferase fusion proteins showed that LinA1 preferentially converted the (+) enantiomer, whereas LinA2 preferred the (-) enantiomer. Concurrent formation and subsequent dissipation of beta-pentachlorocyclohexene enantiomers was also observed in these experiments, indicating that there was enantioselective formation and/or dissipation of these enantiomers. LinA1 preferentially formed (3S,4S,5R,6R)-1,3,4,5,6-pentachlorocyclohexene, and LinA2 preferentially formed (3R,4R,5S,6S)-1,3,4,5,6-pentachlorocyclohexene. Because enantioselectivity was not observed in incubations with whole cells of S. paucimobilis B90A, we concluded that LinA1 and LinA2 are equally active in this organism. The enantioselective transformation of chiral alpha-HCH by LinA1 and LinA2 provides the first evidence of the molecular basis for the changed enantiomer composition of alpha-HCH in many natural environments. Enantioselective degradation may be one of the key processes determining enantiomer composition, especially when strains that contain only one of the linA genes, such as S. paucimobilis UT26, prevail.