Talk:RNA polymerase II holoenzyme

SRB Proteins
Please explain what SRB stands for. The article currently mentions them but gives no explanation for this name. Thank you. 2A02:8388:1600:6900:BE5F:F4FF:FECD:7CB2 (talk) —Preceding undated comment added 00:05, 23 August 2015 (UTC)