反芻胃内繊毛虫類のアミノ酸および蛋白質代謝-4-カゼインの代謝

概要

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Consumption of casein by rumen ciliate protozoa was investigated in order to know their protein metabolism.It is clarified that dissolved casein was consumed by not Ophryoscolecidae but only Isolrichidae and nevertheless, heat treated insoluble casein particle was consumed greatly by Ophryoscolecidae.From these results, it is suggested that the main nutrient for Ophryoscolecidae may be the particulate substance, and for Isotrichidae may be both of dissolved and particulate ones.14C radioactivity was incorporated greatly into ciliates during incubation with 14C-casein. Therefore, dissolved casein may be taken up into the inside of the protozoan body.Analysis of the non-protein nitrogen (NPN) compounds increased in the culture medium after incubation revealed that about 50% of total NPN was peptide-N and it is considered that digestion of protein in protozoan body may be rough and incomplete.
社団法人日本畜産学会の論文