Reference

L-Serine O-sulfate lyase, a new enzyme in extracts from higher plants

L-Serine O-sulfate lyase, a new enzyme in extracts from higher plants. Murakoshi, Isamu; Sanda, Akihiro; Haginiwa, Joju (Fac. Pharm. Sci., Univ. Chiba, Chiba, Japan). Chem. Pharm. Bull., 25(7), 1829-32 (English) 1977. CODEN: CPBTAL. DOCUMENT TYPE: Journal CA Section: 7 (Enzymes) L-Serine O-sulfate ammonia-lyase (I), an enzyme capable of degrading L-serine O-sulfate to pyruvate, NH3, and sulfuric acid, was newly found in exts. from higher plants. The optimum pH for I in higher plants differs from that for I in animals and micoorganisms in the same buffer. The distribution and some properties of I in higher plants are described.

Preparation of DL-serine from ethylene glycol

Preparation of DL-serine from ethylene glycol. Kujira, Katsufumi; Odagiri, Masaki; Imanari, Makoto (Technology Research Assoc. for New Application Development for Light-Weight Fractions, Japan). Jpn. Kokai Tokkyo Koho JP 03240760 A2 28 Oct 1991 Heisei, 5 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C07C229-22. ICS: C07C227-12. APPLICATION: JP 90-33184 14 Feb 1990. DOCUMENT TYPE: Patent CA Section: 34 (Amino Acids, Peptides, and Proteins) Section cross-reference(s): 18, 26 DL-Serine (I), useful as a material for infusion solns., antibiotics, and L-tryptophan and as an additive for feeds, is prepd. by (oxidative) dehydrogenation of ethylene glycol (II); subjecting the resulting glycolaldehyde (III) solns. to Strecker reaction at III/HCN = 1.0-1.5 mol and ammonia/HCN = 3.0-10.0 mol at 20-80° for 15-120 min, and hydrolysis of the product. Air and gaseous II-H2O mixt. were passed through catalyst-packed column at 270°, the reaction mixt. (contg. 22 mmol III) was autoclaved with 20 mmol HCN and 100 mmol ammonia at 45-55° for 30 min, then with aq. NaOH at 70-80° for 2 h to give 82.2% I, vs. 68.5%, when 40 mmol ammonia was used instead.