we propose that , associated with ri ( b ) , in which 26s rna is synthesized , there is a virus-specific protein that functions to promote initiation of 26s rna transcription at an internal site on the 42s minus-strand rna and to block transcription on the minus strand in this region by the sfv rna polymerase that had bound and was copying the minus-strand rna from its 3 ' end .
C1158830
initiation
C0040649
transcription