Transcription bubble Nontemplate strand RNA polymerase Rewinding Unwinding DNA 3 3 stran d RNA 6′RNA-DNA Active site hybrid, 8 bp Direction of transcription (5)CGCTATAGCGTTT(3) DNA nontemplate(coding)strand (3)GCGATATCGCAAA(5) DNA template strand (5) CGCUAUAGCGUUU(3) RNA transcript