RNA polymerase II CTD heptapeptide repeat phosphatase activity obsolete dephosphorylation of RNA polymerase II C-terminal domain https://github.com/geneontology/go-ontology/issues/24824 true biological_process generation of II(A) form of RNA polymerase II 2009-09-29T04:34:14Z CTD domain dephosphorylation of RNA polymerase II This term was obsoleted because it represents a molecular function. mah GO:0070940 OBSOLETE. The process of removing a phosphate group from an amino acid residue in the C-terminal domain of RNA polymerase II. Some dephosphorylation occurs during transcription while some may occur after the enzyme is released from the template in order to prepare it for the beginning of the transcription cycle again. RNA polymerase II with little or no phosphorylation is referred to as the hypophosphorylated or II(A) form. generation of hypophosphorylated CTD of RNA polymerase II