passages.id: split_5_test_1088_passage
passages.type: progene_text
passages.text: Gel mobility shift assays showed that RpbA - His ( 6 ) specifically binds to a DNA fragment containing the cpcB1A1 promoter and that significant binding can be achieved with equimolar amounts of RpbA - His ( 6 ) and the cpcB1A1 promoter probe .