part of DNA-templated transcription open complex formation 2010-12-02T02:15:04Z DNA-templated transcriptional open complex formation GO:0001112 GO:0001127 DNA-dependent transcriptional open complex formation krc Any process involved in the melting of the DNA hybrid of the core promoter region within the transcriptional closed complex of an RNA polymerase preinitiation complex (PIC) to produce an open complex where the DNA duplex around the transcription initiation site is unwound to form the transcription bubble. promoter melting transcription open complex formation at bacterial-type RNA polymerase promoter transcriptional open complex formation at bacterial-type RNA polymerase promoter biological_process protein-DNA complex remodeling DNA-templated transcription initiation