EOG89PDFX GO:0004721 1/64 phosphoprotein phosphatase activity molecular_function "Catalysis of the reaction: a phosphoprotein + H2O = a protein + phosphate. Together with protein kinases, these enzymes control the state of phosphorylation of cell proteins and thereby provide an important mechanism for regulating cellular activity." [EC:3.1.3.16, ISBN:0198547684]