title: Pepsinogen polymorphism frequencies in a Negro population.
mesh_terms: D000483:Alleles; D044383:Black People; D004586:Electrophoresis; D005787:Gene Frequency; D006801:Humans; D010435:Pepsinogens / Q000652:urine*; D010641:Phenotype; D011110:Polymorphism, Genetic
chemical_list: D010435:Pepsinogens