Transcription of the operator proximal and distal ends of the tryptophan operon: evidence that trpE and trpA are the delimiting structural genes

Abstract

Measurements of the time required for transcription of regions of known genetic length in the tryptophan operon of Escherichia coli indicate that there are no major unidentified structural genes in the operon either before the operator proximal E gene or after the operator distal A gene.