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两种瘤胃细菌纯培养物对γ-亚麻酸的氢化作用。

The hydrogenation of gamma-linolenic acid by pure cultures of two rumen bacteria.

作者信息

Kemp P, Lander D J

出版信息

Biochem J. 1983 Nov 15;216(2):519-22. doi: 10.1042/bj2160519.

Abstract

Two species of rumen bacteria that have been previously shown to partially hydrogenate alpha-linolenic acid have been examined for their ability to hydrogenate gamma-linolenic acid. Free gamma-linolenic acid is hydrogenated in vitro to stearic acid by a rumen Fusocillus sp. (N.C.I.B. 11026), but only to cis,trans-octadec-6,11-enoic acid by a Butyrivibrio sp. The sequential hydrogenations are preceded by a delta 12-cis-delta 11-trans isomerization identical with that observed in the hydrogenation of alpha-linolenic acid and linoleic acid.

摘要

先前已证明两种瘤胃细菌能够部分氢化α-亚麻酸,现对它们氢化γ-亚麻酸的能力进行了研究。游离的γ-亚麻酸在体外被一种瘤胃梭状芽孢杆菌属(N.C.I.B. 11026)氢化为硬脂酸,但被一种丁酸弧菌属仅氢化为顺,反-十八碳-6,11-二烯酸。在连续氢化之前会发生δ12-顺式-δ11-反式异构化,这与在α-亚麻酸和亚油酸氢化过程中观察到的异构化相同。

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