Catalysis of the reaction: a phosphoprotein + H2O = a protein + phosphate. Together with protein kinases, these enzymes control the state of phosphorylation of cellular proteins and thereby provide an important mechanism for regulating cellular activity. [ https://www.worldcat.org/search?q=bn%3A0198547684 ]

Synonyms: protein phosphatase activity phosphoprotein phosphohydrolase activity

This is just here as a test because I lose it