反刍动物盲肠中微生物活动合成的胱氨酸的去向。

Fate of cyst(e)ine synthesized by microbial activity in the ruminant caecum.

作者信息

Elliott R, Little D A

出版信息

Aust J Biol Sci. 1977 Jun;30(3):203-6. doi: 10.1071/bi9770203.

Abstract

Cyst(e)ine synthesized by microorganisms in the caecum of sheep was labelled following the infusion of Na2 35SO4 into the terminal ileum. [35S]Cyst(e)ine activity was detected in the faeces, but not in plasma or wool. Appreciable absorption of 35S, presumably in the form of sulphide, into the circulation occurred, and its presence in saliva was demonstrated. It was concluded that nutritionally negligible quantities of cyst(e)ine are likely to be absorbed from the ovine large intestine.

摘要

在向绵羊回肠末端注入Na2 35SO4后，绵羊盲肠中由微生物合成的胱氨酸被标记。在粪便中检测到了[35S]胱氨酸活性，但在血浆或羊毛中未检测到。推测是以硫化物形式存在的35S有相当一部分被吸收进入了循环系统，并且在唾液中也证实了其存在。得出的结论是，从绵羊大肠中吸收的胱氨酸数量在营养方面可能微不足道。