抄録
Thiamine synthesis by washed cells of certain lactic acid bacteria from pyrimidyl- and thiazole moieties of thiamine was investigated. The cell of L. bifidus was found to be a good thiamine synthesizer. Under a good condition, the proportion of synthesized thiamine to the theoretical value was about 100 per cent. For the good yield of the vitamin, it was found that glucose should be added to the reaction mixture, the initial pH should be kept between 5 to 8 inclusive and the cells should be young. L. acidophilus, Lactobacillus from several fermented milk products, and a strain of Streptococcus isolated from a lactic acid bacterial preparation, all failed to synthesize significant amount of thiamine.
