label: RNA polymerase II CTD heptapeptide repeat modifying activity
label_lc: rna polymerase ii ctd heptapeptide repeat modifying activity
description: "A catalytic activity that acts on the RNA polymerase II large subunit CTD heptapeptide repeat (consensus YSPTSPS). Reversible modifications cof the RNA polymerase II CTD repeats contribute to regulation of RNA polymerase activity."