The Nutritional Requirements of Lactobacillus pentosus 124-2
- 1 May 1948
- journal article
- research article
- Published by American Society for Microbiology in Journal of Bacteriology
- Vol. 55 (5) , 683-692
- https://doi.org/10.1128/jb.55.5.683-692.1948
Abstract
Biotin, pantothenic acid, and nicotinic acid are needed to satisfy the vitamin requirements of L. pentosus 124-2. No chemically defined medium gave so rapid growth as did a natural medium. One of the best media, containing hydrolyzed casein, required some additions for maximum response of the organism, but glutathione, glutamine, strepo-genin, Wilson''s liver B, a whey prepn., and a peptone prepn. had no effect. An aqueous extract of malt sprouts caused the most marked stimulation. The nature of the stimulatory factor is unknown. 18 amino acids were neces-sary in synthetic medium if growth near that possible on a "natural" medium was to be obtained.Keywords
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