Abstract
p-Fluorophenylalanine (PFP) and m-fluorophenylalanine were the most effective inhibitors on the growth of Corynebacterium glutamicum ATCC 13032 among the analogs of phenylalanine and tyrosine tested. Their inhibitory effects were released by L-phenylalanine, and slightly by L-tyrosine and L-tryptophan. 3-Aminotyrosine (3AT), p-aminophenylalanine, o-fluorophenylalanine, and β-2-thienylalanine were weak inhibitors. Resistant mutants of C. glutamicum isolated on the medium containing both PFP and 3AT or PFP and L-tyrosine were found to accumulate both L-tyrosine and L-phenylalanine, while resistant mutants isolated on the medium containing only PFP were found to produce only L-phenylalanine. Resistant mutants from other glutamic acid producing bacteria isolated on the medium containing both PFP and 3AT or both PFP and L-tyrosine were found to accumulate L-tyrosine and L-phenylalanine.
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