منابع مشابه
Enzymatic formation of acetylgalactosamine.
Several papers have been published on the biosynthesis of glucosamine in different organisms (l-3), but the reactions which lead to the synthesis of galactosamine have hardly been explored. The first indication of its mode of synthesis came from the isolation of uridine diphosphate’ acetylgalactosamine from liver by Pontis (4). This finding showed that the transformation of acetylhexosamines is...
متن کاملEnzymatic Formation of Uridine Diphosphoglucuronic
Many studies have shown that, although glucose is converted to glucuronides without cleavage of the carbon chain (2--S), free glucuronic acid functions poorly, if at all, as a precursor of glucuronic acid-containing compounds in living systems (e.g. phenol or alcohol glucuronides, mucopolysaccharides) (9-l 1). An important advance in elucidating the nature of the intermediates in the biosynthes...
متن کاملThe Enzymatic Formation of Lecithin from Cytidine
The enzyme preparations used in this study consisted of particulate fractions from frozen chicken liver or fresh rat liver isolated from 0.25 M sucrose homogenates by a method already described (1). These preparations contained both mitochondria and microsomes. The enzyme was suspended in 0.02 M Tris buffer of pH 8.0 containing 0.001 M Versene in a concentration of 20 to 40 mg. per ml. and coul...
متن کاملEnzymatic formation of polysulfides from mercaptopyruvate.
An enzyme system in rat liver catalyzes the decomposition of mercaptopyruvate to pyruvate and sulfur (1). At the optimal pH of this system, this reaction has been shown to be a transsulfuration (2). Acceptors of the sulfur include cyanide (2), sulfite and sulfinates (3). In the absence of an acceptor, the sulfur is fixed in a reactive form which decomposes to free sulfur at lower pH. This repor...
متن کاملEnzymatic Formation of Catechol from Anthranilic Acid.
Anthranilic acid is known to be formed from kynurenine in animals and microorganisms (3-6) and to be degraded by cell-free extracts of a Pseudomonas species adapted to L-tryptophan (7). Catechol has been postulated as an intermediate in the catabolism of anthranilic acid on the basis of experiments utilizing sequential enzyme induction (8). Several groups of investigators have recently succeede...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1957
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)64933-6