. "\"The aggregation, arrangement and bonding together of proteins on a bacterial-type RNA polymerase promoter DNA to form the transcriptional preinitiation complex (PIC), the formation of which is a prerequisite for transcription by RNA polymerase.\" [GOC:txnOH, PMID:18280161]" . . "bacterial-type RNA polymerase preinitiation complex assembly" . "bacterial-type RNA polymerase transcription PIC biosynthesis" . "bacterial-type RNA polymerase transcription PIC formation" . "bacterial-type RNA polymerase transcriptional preinitiation complex formation" . .