[A genetic-demographic study of the South Altaian population of the Mendur-Sokkon village (Altai Republic)]. / Genetiko-demograficheskii analiz populiatsii iuzhnykh altatsev pos. Mendur-Sokkon (Respublika Altai).

The main demographic parameters of the population of South Altaians from the Mendur-Sokkon village, Ust'-Kanskii raion, Altai Republic, were studied. This population was classified as a growing one because the population's reproductive size was large (37%), the prereproductive part constituted the majority of the population (52%), and the average number of surviving children per spouse was 2.6. The population studied began to mix with other ethnic groups (mostly Russians and Kazakhs) only recently; therefore, the proportion of interethnic hybrids was only 5%. The tribal structure of the Mendur-Sokkon population was typical of all South Altaians and characterized by stringent observance of exogamous regulations. An ethnically pure core was preserved in the population. The degree of endogamy was 0.36; however, the population mostly exchanged marriage migrants within the Ust'-Kanskii raion. A study of postreproductive females revealed that the average number of surviving children and pregnancies per female was 4.9 and 5.3, respectively; these values were lower than those in indigenous northern Siberian populations studied earlier. The high value of the Crow's index of total selection (Itot = 0.63) was mainly accounted for by the differential fecundity component, I(f) = 0.40, whereas the prereproductive mortality component (Im = 0.16) was considerably lower than in northern Siberian populations (Nganasans, Forest and Tundra Nentsi, Evens, Asian Eskimos, etc.) and closer to the values characteristic of urban human populations.

[Genetic analysis of the South Altaian population of the Mendur-Sokkon village, Altai Republic]. / Geneticheskii analiz struktury populiatsii iuzhnykh altaitsev pos. Mendur-Sokkon (Respublika Altai).

This study was a continuation of complex research on the gene pool of indigenous Siberian populations conducted at the Institute of Cytology and Genetics, Siberian Division, Russian Academy of Sciences. In the population of South Altaians from the Mendur-Sokkon village, Ust'-Kanskii raion, Altai Republic, polymorphism for the following genetic markers was studied: blood groups ABO, MNSs, Rhesus, Kell, Duffy, and P; erythrocyte acid phosphatase (AcP); phosphoglucomutase 1 (PGM1); haptoglobin (Hp); and transferrin (Tf). The genetic position of South Altaians relative to the populations of the European part of Russia, Siberia, and the Urals was estimated. It was demonstrated that the gene pool of the South Altaian population of Mendur-Sokkon possessed both Caucasoid and Mongoloid genetic characteristics, with the latter prevailing. Genetically, this population is most closely related to Mongols and Nentsis. The genetic distance between South and North Altaians was large; this agreed with earlier genetic data and confirmed anthropological and ethnographic evidence indicating that these two groups had different backgrounds and were at different stages of ethnogenesis.

[Characteristics of the gene pool of Russian Old Believers in Siberia based on polymorphism of blood groups, isoenzymes, and blood proteins]. / Osobennosti genofonda Russkikh staroverov Sibiri na osnove izucheniia polimorfizma grupp krovi, izofermentov i syvorotochnykh belkov.

The frequency distributions of A1A2B0, Rhesus, MNSs, P, Duffy, Kell, Hp, Tf, AcP, PGM1 alleles, and haplotypes were studied in Siberian populations of Old Believers (Burnyi village, Krasnoyarskii krai, and Isetskii raion, Tyumenskaya oblast) and in ethnic Russians from Tyumenskaya oblast. Features characteristic of the genetic structure of these groups were revealed. The Siberian groups of Russians were shown to be genetically removed from European Russian populations (Tverskaya and Vologodskaya oblasts). The Burnyi population of Old Believers was significantly removed from the other groups of Russians due to peculiarities in the sample.

[Hepatitis B markers in southern Altai inhabitants of the village of Mendur-Sokkon (the Republic of Altai). HBsAg subtyping in hepatitis B virus isolates with monoclonal antibodies]. / Markery virusnogo gepatita B u iuzhnykh altaitsev pos. Mendur-Sokkon (respublika Altai). Subtipirovanie HBsAg izoliatov BGB s pomoshch'iu monoklonal'nykh antitel.

Blood samples taken from 231 native inhabitants of the village of Mendur-Sokkon located in the Republic of Altai (South-Western Siberia, Russia) were tested for the presence of virus hepatitis B (HBV) markers. 31 samples (13.4%) were found to contain HBsAg, 111 samples (48.05%) were found to contain total anti-HBc antibodies, 123 samples (53.24%) were found to contain anti-HBs antibodies and 15 blood samples (6.49%), anti-HBc antibodies without anti-HBs antibodies and HBsAg. The age-dependent distribution of the occurrence of HBV markers among the aboriginal population of the South Altal remained unchanged (69.9 +/- 7.9%) for the last 50 years. The vertical and horizontal routes of HBV transmissions were noted. The data obtained in this study are indicative of a highly endemic character of HBV of the territory of Mendur-Sokkon. HBsAg-positive blood samples were taken for HBsAg subtyping with the use of a panel of monoclonal antibodies. Two subtypes of HBsAg were detected: ayw1-2 and ayw3varB with the occurrence of 92.6% and 7.4%, i.e. distributed in the ratio 25/2.