PREPARATION OF d- AND l-METHIONINE FROM dl-METHIONINE BY ENZYMATIC RESOLUTION
نویسندگان
چکیده
منابع مشابه
Preparation of d- and l-methionine from dl-methionine by enzymatic resolution.
It has been shown previously (1,2) that the synthesis of CO-NH linkages by papain as well as by other proteinases is characterized by extreme stereochemical specificity. Thus, upon the addition of cysteine-activated papain to a mixture of carbobenzoxy-nn-glutamic acid and aniline, there is formed carbobenzoxy-L-glutamic acid anilide, which separates in crystalline form. The carbobenzoxy-n-gluta...
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1. Metabolism, in broiler chicks, of DL-2-hydroxy 4-methylthiobutanoic acid (DL-HMB), DL-methionine and L-methionine was compared in vivo using 14C-labelled tracers. 2. The distribution of L-[1-14C]methionine and DL-[1-14C]HMB in the major body tissues was examined for a period of 120 min after administration. 3. The relative oxidation (14CO2 exhaled), excretion and incorporation into tissue pr...
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This study was conducted to compare the bio-efficacy of herbal methionine (H-Met) relative to DL-methionine (DL-Met) on 160 “Ross 308” broiler chickens. DL-Met and H-Met were added to the basal diet in eight experimental treatments with three and four concentrations respectively in starter, grower and finisher period. Blood parameters which were measured at 24 and 42 days of age consisted of: s...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1948
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)57418-4