. "Catalysis of the reaction: a phosphorylated MAP kinase + H2O = a MAP kinase + phosphate, where the MAP kinase (MAPK) is part of a MAPK signaling cascade that contributes to cell wall biogenesis." . . "MAP kinase phosphatase activity involved in regulation of cell wall biogenesis" . "Mpk1 phosphatase activity" . "Slt2 phosphatase activity" . .