Region 2.3, 2.4, and 4.2 contact bases in the -10 and -35 elements, respectively;
sigma factor region 1.2 contacts the promoter region just downstream from the -10 element, and region 3.0 contacts the promoter region just upstream from the -10 element.
#Unit 3. Fundamental Processes#Basics of Prokaryotic Transcription#Part B Pointers
