RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity
rna polymerase ii ctd heptapeptide repeat s5 phosphatase activity
Catalysis of the reaction: RNA polymerase II large subunit CTD heptapeptide repeat--phospho-L-serine (consensus YSPTSPS)(position 5) + H2O = RNA polymerase II large subunit + phosphate.