American Society for Microbiology, Journal of Bacteriology, 11(184), p. 3135-3141, 2002
DOI: 10.1128/jb.184.11.3135-3141.2002
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ABSTRACT The tutB gene, which lies just downstream of tpl , has been cloned from Erwinia herbicola , and its product was analyzed. Despite its high sequence similarity to tryptophan transporters, TutB was found to be a tyrosine-specific transporter. Tryptophan acted as a competitive inhibitor of tyrosine transport. Unlike the tryptophanase operon, the tpl and tutB genes do not constitute an operon.