we also examine the effect of the auxiliary transcription factor nusa on transcription of these mutants , and we provide support for the proposal that specific effects of nusa on transcription termination require a sequence known as `` '' boxa '' '' ( olson , e.r. , flamm , e.l. , and friedman , d.i . ( 1982 ) cell 31 , 61-70 ) .
C0040649
transcription
C0597600
transcription termination