title: [Serum alkaline phosphatase polymorphism among Chukchis].
abstract: In the course of studies on the polymorphism of the serum alkaline phosphatase among chickens three variants of this enzyme were revealed instead of two usually encountered among other groups of population. An extraordinary high frequency of the Pp 2 type of alkaline phosphatase was recorded as compared to other groups of population studied. Frequencies of Pp 2 and Pp 3 types increase considerably with increasing age of the people in the groups studied, while the frequency of the Pp 1 type decreases in older age groups at the expense of its decrease in combination with the B and O blood groups, whereas when it is combined with the A blood group its frequency remains unchanged. It is assumed that the variants Pp 2 and Pp 3 of serum alkaline phosphatase are of adaptive significance under the given ecological condtions. The variant Pp 1 in combination with the A blood group probably form an adaptive complex.
mesh_terms: D000017:ABO Blood-Group System; D000293:Adolescent; D000367:Age Factors; D000469:Alkaline Phosphatase / Q000097:blood*; D002648:Child; D003433:Crosses, Genetic; D005838:Genotype; D006242:Haptoglobins / Q000032:analysis; D006801:Humans; D010670:Phenylthiourea; D011110:Polymorphism, Genetic; D012800:Siberia; D013649:Taste
chemical_list: D000017:ABO Blood-Group System; D006242:Haptoglobins; D010670:Phenylthiourea; D000469:Alkaline Phosphatase
vernacular_title: Polimorfizm syvorotochnoĭ shchelochnoĭ fosfatazy sredi chukcheĭ