| 单词 | α-alanine |
| 释义 | > as lemmasα-alanine a. A hydrophobic amino acid which is a constituent of most proteins (more fully α-alanine). Also as a count noun: a residue of this compound as a constituent of a peptide or protein.Alanine is 2-aminopropanoic acid, CH3CH(NH2)COOH. It has two optical isomers, of which the l-form is found in proteins, and the d-form in bacterial cell walls. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > amino acids alanine1850 serine1870 amino-acid1887 histidine1896 canavanine1932 Glu1937 Gly1937 Ala1945 Asp1945 alliin1947 Asn1957 Asx1957 Glx1958 Gln1961 1850 tr. A. Strecker in Chem. Gaz. 8 248 On evaporation, beautiful rhombic prisms of the new body, which I propose to call alanine, separate. 1863 H. Watts Dict. Chem. I. 63 Alanine crystallises..in colourless needles having the form of oblique rhombic prisms united in tufts. The aqueous solution has a sweet taste. 1880 H. E. Armstrong & C. E. Groves Miller's Elements Chem. (ed. 5) III. x. 868 α-Alanine..crystallizes in colourless rhombic prisms very soluble in water; it has a sweet taste, and apparently is without action on vegetable colours. 1915 H. C. Sherman Chem. Food & Nutrition iv. 108 Alanin, one of the prominent cleavage products of protein, yields by hydrolysis lactic acid and ammonia. 1954 A. H. T. Robb-Smith in H. W. Florey Lect. Gen. Pathol. xxx. 558 The nature of elastica is at the present time somewhat obscure. Chemically it is a polypeptide with a high content of glycine, alanine and valine. 1968 C. P. Read in M. Florkin & B. T. Scheer Chem. Zool. II. iii. iii. 348 The data suggested that the formation of α-alanine and succinate involve carbon dioxide fixation. 1976 Compar. Biochem. & Physiol. B. 55 447/1 Alanine is thought to function as a carbon sink in amino acid metabolism. 1991 G. W. Patterson & W. D. Nes Physiol. & Biochem. Sterols i. 18 The protein consists of 121 amino acids with a serine at the N-terminus and an alanine at the C-terminus. 2008 Times (Nexis) 21 Apr. 20 The team identifies a series of metabolites linked to high blood pressure, such as the amino acid alanine. < as lemmas |
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