L-半乳糖酸-1,4-内酯
L-半乳糖酸-1,4-内酯结构式
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常用名 | L-半乳糖酸-1,4-内酯 | 英文名 | L-galactono-1,4-lactone |
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| CAS号 | 1668-08-2 | 分子量 | 178.14000 | |
| 密度 | 1.766g/cm3 | 沸点 | 467.9ºC at 760mmHg | |
| 分子式 | C6H10O6 | 熔点 | 134-136ºC | |
| MSDS | 中文版 美版 | 闪点 | 201.5ºC |
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The biosynthesis of erythroascorbate in Saccharomyces cerevisiae and its role as an antioxidant.
Free Radic. Biol. Med. 28(2) , 183-92, (2000) This study investigated the ability of the yeast Saccharomyces cerevisiae to synthesize ascorbate and its 5-carbon analogue erythroascorbate from a variety of precursors, and their importance as antioxidants in this organism. Studies of ascorbate and analogue... |
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De novo asymmetric syntheses of C-4-substituted sugars via an iterative dihydroxylation strategy.
Carbohydr. Res. 341(10) , 1505-21, (2006) A short and highly efficient route to various C-4 substituted sugar lactones has been developed. The key to the overall transformation is the sequential osmium-catalyzed dihydroxylation reaction of substituted 2,4-dienoates and an allylic substitution at the ... |
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Cellular ascorbic acid regulates the activity of major peroxidases in the apical poles of germinating white spruce (Picea glauca) somatic embryos.
Plant Physiol. Biochem. 45(3-4) , 188-98, (2007) In previous studies we have reported that applications of ascorbic acid (ACS) enhance the conversion frequency of white spruce somatic embryos by "rescuing" structurally disorganized meristems and inducing cell proliferation in the apical poles [C. Stasolla, ... |
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Galactone-γ-lactone-dependent ascorbate biosynthesis alters wheat kernel maturation.
Plant Biol. (Stuttg.) 14(4) , 652-8, (2012) Kernel development and maturation involve several well-characterised events, such as changes in ascorbate (ASC) metabolism, protein synthesis and storage, programmed cell death (PCD) of starchy endosperm and tissue dehydration. Despite many studies focusing o... |
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Hydroponically cultivated radish fed L-galactono-1,4-lactone exhibit increased tolerance to ozone.
Planta 214(3) , 383-91, (2002) Leaf L-ascorbate content of an ozone (O3)-sensitive radish genotype (Raphanus sativus L. cv. Cherry Belle) was increased 2-fold by feeding hydroponically cultivated plants L-galactono- 1,4-lactone (GalL). Plants were grown in controlled-environment chambers v... |
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Expression of aspartyl protease and C3HC4-type RING zinc finger genes are responsive to ascorbic acid in Arabidopsis thaliana.
J. Exp. Bot. 62(10) , 3647-57, (2011) Ascorbate (AsA) is a redox buffer and enzyme cofactor with various proposed functions in stress responses and growth. The aim was to identify genes whose transcript levels respond to changes in leaf AsA. The AsA-deficient Arabidopsis mutant vtc2-1 was incubat... |
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The terminal step in vitamin C biosynthesis in Trypanosoma cruzi is mediated by a FMN-dependent galactonolactone oxidase.
Biochem. J. 407(3) , 419-26, (2007) Humans lack the ability to synthesize vitamin C (ascorbate) due to the absence of gulonolactone oxidase, the last enzyme in the biosynthetic pathway in most other mammals. The corresponding oxidoreductase in trypanosomes therefore represents a target that may... |
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Conversion of L-galactono-1,4-lactone to L-ascorbate is regulated by the photosynthetic electron transport chain in Arabidopsis.
Biosci. Biotechnol. Biochem. 72(10) , 2598-607, (2008) In this study we focused on the effects of light irradiation and the addition of L-galactono-1,4-lactone (L-GalL) on the conversion of exogenous L-GalL to L-ascorbate (AsA) and the total AsA pool size in detached leaves of Arabidopsis plants and transgenic pl... |
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Importance of Arg-599 of β-galactosidase (Escherichia coli) as an anchor for the open conformations of Phe-601 and the active-site loop.
Biochem. Cell Biol. 88(6) , 969-79, (2010) Structural and kinetic data show that Arg-599 of β-galactosidase plays an important role in anchoring the "open" conformations of both Phe-601 and an active-site loop (residues 794-803). When alanine was substituted for Arg-599, the conformations of Phe-601 a... |
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Simultaneous determination of gluconolactone, galactonolactone and galactitol in urine by reversed-phase liquid chromatography: application to galactosemia.
J. Chromatogr. A. 570(2) , 277-84, (1991) A reversed-phase liquid chromatographic assay was developed for the specific evaluation of metabolic by-products in the urine of galactosemic patients and based on the simultaneous determination of gluconolactone, galactonolactone and galactitol. The procedur... |