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EFFECT OF TETRACYCLINES ON THE INTRACELLULAR AMINO ACIDS OF MOLDS

^a Department of Microbiology, University of Chicago, Chicago, Illinois

ABSTRACT

FREEMAN, BOB A. (University of Chicago, Chicago, Ill.) AND RICHARD CIRCO. Effect of tetracyclines on the intracellular amino acids of molds. J. Bacteriol. 86:38–44. 1963.—The tetracycline antibiotics were shown to alter the amino acid metabolism of molds whose growth is not markedly affected. Eight molds were grown in the presence of these antiobiotics; four exhibited a general reduction in the concentration of the intracellular amino acids, except for glutamic acid and alanine. In most of these four cultures, the tetracyclines also caused the complete disappearance of arginine, lysine, proline, phenylalanine, and tyrosine from the intracellular amino acid pool. The significance of these observations and the usefulness of the method in the study of the mechanisms of antibiotic action are discussed.

¹ Present address: State Laboratory of Hygiene, Madison, Wis.