抄録
The reaction between vitamin K and sulfhydryl group, which takes place in dilute acid solution and broth, and also the action of V. K on the cell protein of microbes have been studied. The results obtained are as follows:
(1) V. K reacts with sulfhydryl group in dilute acid solution and broth as well as in alkaline solution.
(2) As to Micrococcus persflavus and Bacillus subtilis the growth of which is inhibited by V. K3, the colour of the cells changes immediately to light yellow from white in ammonia solution containing V. K3, while Pseudomonas aeruginosa and Escherichia coli, the growth is not inhibited, do not change the colour.
(3) Amounts of sulfhydryl group contained in the cell protein decrease after reacting with V. K.
