The de-repression of thiamine biosynthesis by adenosine a tool for investigating this biosynthetic pathway.

ABSTRACT: 1. Growth of Salmonella typhimurium LT2 in the presence of adenosine was shown to cause enormous synthesis of thiamine in washed-cell suspensions. 2. Evidence that this was due to de-repression and not an accumulation of precursors was obtained by using a mutant blocked in the biosynthesis of the thiazole moiety, which showed a similarly large synthesis of the pyrimidine of thiamine. 3. The specific requirements for a source of energy, nitrogen and sulphur were investigated, and indicated new synthesis in this system.

SUBMITTER: Newell PC 

PROVIDER: S-EPMC1265165 | biostudies-other | 1966 Aug

REPOSITORIES: biostudies-other