Tryptophanase-tryptophan reaction. XI. Concentration of intracellular tryptophan in Escherichia coli

Happold, F.C.; Scott, T.A.

Hoppe-Seyler's Zeitschrift für Physiologische Chemie 331: 118-123

1963


ISSN/ISBN: 0018-4888
PMID: 13952674
Accession: 026018536

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Abstract
Free intracellular L-tryptophan occurred in E. coli. The presence of phenylalanine or tyro-sine in the growth medium caused a depression of the intracellular tryptophan level. Excess Na ions in the growth medium caused an accumulation of intracellular tryptophan, while K ions had the opposite effect. The results are discussed in relation to the induced synthesis of tryptophanase.