Bacillus cereus var. mycoidesのCTC耐性に関する研究-III. : CTC-感受性株とCTC-耐性株の栄養要求の比較

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In the examination various organic compounds, which would seem to be the growth factors of strains both CTC-sensitive and CTC-resistant or either strain of them, were tested in terms of the additives to the Minimal 10 (M 10) medium. The results obtained were as follows; 1) CTC-resistant strain grown in the M 10 medium was not affected by supplement of any single amino acid, but grew best on casamino acids. The growth of it was not accelerated only by B-vitamins, but also by various bases of nucleic acid; 2) On the contrary, the CTC-sensitive strain could not grow in the M 10 medium on supplement of either casamino acids, B-vitamins, or the combination of both components. However, it grow on purine bases of either adenine or of guanine. Additionally, the supplement of casamino acids and pyrimidine bases were more stimulative for its growth, 3) Comparatively growth of the CTC-sensitive strain in the medium fortified by the purine bases and the casamino acids were roughly identical to that of basal medium supplemented with yeast extract.
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