part of regulation of transcription by RNA polymerase II catalytic activity, acting on a protein RNA polymerase II CTD heptapeptide repeat modifying activity https://github.com/geneontology/go-ontology/issues/24910 https://github.com/geneontology/go-ontology/issues/24980 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. pg GO:0140994 molecular_function RNA polymerase II large subunit CTD heptapeptide repeat modifying activity RNA polymerase II CTD repeat modifying activity 2023-02-22T13:37:21Z