title: The genetics of placental alkaline phosphatase: a possible 'null' allele.
mesh_terms: D000469:Alkaline Phosphatase; D000483:Alleles; D002874:Chromosome Mapping; D005260:Female; D005787:Gene Frequency; D005828:Genetics, Population; D006801:Humans; D010641:Phenotype; D010920:Placenta / Q000201:enzymology*; D011247:Pregnancy; D006113:United Kingdom
chemical_list: D000469:Alkaline Phosphatase