Abstract
Summary
A slightly virulent strain of human tubercle bacillus was cultured in a vitamin free medium or in media to which riboflavin with or without other vitamins and biotin were added.
It was found that the presence or absence of riboflavin made no difference in the growth of the tubercle bacillus. On the other hand during the growth of the organism there was found a slow but steady disappearance of riboflavin from the medium. The presence of lumichrome crystals in the media containing riboflavin after growth of the tubercle bacillus indicated that the loss of the vitamin was due to conversion to lumichrome.
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