part_of RNA polymerase I transcription pathway RNA polymerase I promoter clearance pathway 2025-05-12T11:44:06Z PW:0002735 RNA Polymerase I Promoter Clearance The series of events mediating the transition from the initiation to the elongation phases of transcription by RNA polymerase I, generally including a conformational change from the initiation conformation to the elongation conformation. Promoter clearance often involves breaking contact with transcription factors involved only in the initiation phase and making contacts with elongation specific factors. gthayman pathway