catalytic activity:A phosphate monoester + H(2)O = an alcohol + phosphate.,cofactor:Binds 1 magnesium ion.,cofactor:Binds 2 zinc ions.,disease:Defects in ALPL are a cause of hypophosphatasia adult type (hypophosphatasia) [MIM:146300].,disease:Defects in ALPL are a cause of hypophosphatasia childhood (hypophosphatasia) [MIM:241510].,disease:Defects in ALPL are a cause of hypophosphatasia infantile (hypophosphatasia) [MIM:241500]; an inherited metabolic bone disease characterized by defective skeletal mineralization. Four hypophosphatasia forms are distinguished, depending on the age of onset: perinatal, infantile, childhood and adult type. The perinatal form is the most severe and is almost always fatal. Patients with only premature loss of deciduous teeth, but with no bone disease are regarded as having odontohypophosphatasia (odonto).,function:This isozyme may play a role in skeletal mi

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