RNA polymerase II CTD heptapeptide repeat T4 phosphatase activity
rna polymerase ii ctd heptapeptide repeat t4 phosphatase activity
Catalysis of the reaction: RNA polymerase II large subunit CTD heptapeptide repeat--phospho-L-threonine (consensus YSPTSPS)(position 4) + H2O = RNA polymerase II large subunit + phosphate.