label: RNA polymerase II CTD heptapeptide repeat peptidyl-prolyl isomerase activity
label_lc: rna polymerase ii ctd heptapeptide repeat peptidyl-prolyl isomerase activity
description: "Catalysis of the reaction: RNA polymerase II large subunit CTD heptapeptide repeat (consensus YSPTSPS) cis-proline (omega=180) = RNA polymerase II large subunit trans-proline (omega=0)."