taken together , our results are consistent with and extend those obtained by ryan and chamberlin ( ryan , t. , and chamberlin , j . ( 1983 ) j. biol . chem . 258 , 4690-4693 ) for the trp operon attenuator and argue strongly against models that propose that dna hairpin formation in the nontranscribed dna strand or pairing of the nascent rna with the nontranscribed dna strand are important for transcription termination .
C0598312
dna
C0012854
dna