an increase in the rate of synthesis of ara-specific messenger ribonucleic acid as measured by deoxyribonucleic acid-ribonucleic acid hybridization has been detected in the induced wild-type ( ara ( + ) ) strain of escherichia coli b/r as compared with the uninduced control , thus providing evidence that regulation of the positively controlled l-arabinose operon is at the level of transcription .
C0035668
acid-ribonucleic
C0040649
transcription