abnormal alkaline phosphatase activity decreased alkaline phosphatase activity 2012-01-25T03:51:35Z MP:0011585 MPheno.ontology csmith decreased alkaline phenyl phosphatase activity decreased alkaline phosphohydrolase activity decreased alkaline phosphomonoesterase activity decreased glycerophosphatase activity decreased orthophosphoric-monoester phosphohydrolase (alkaline optimum) decreased phosphate-monoester phosphohydrolase (alkaline optimum) decreased phosphomonoesterase activity reduced ability to catalyze the reaction: an orthophosphoric monoester + H2O = an alcohol + phosphate, with an alkaline pH optimum