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The contact zone between Moscow and Western Dvina chromosomal races of common shrew Sorex araneus L. at the south of the Valdai Hights was traced over a distance of 20 km. Within this, close to parapatric, contact zone of chromosomal races the width of sympatry zone was about 500 m (the narrowest among currently known hybrid zones), and the proportion of(More)
217 Molecular analysis with microsatellite markers of the chromosome arms has demonstrated that, in the common shrew Sorex araneus L., the gene flow through the acrocentric chromosomes and the chroo mosomes rearranged by Robertsonian translocations are similar in all the interracial hybrid zones studied so far [1, 2]. Hence, Robertsonian chromosome fusions(More)
158 Starting from 1961, two models for transformaa tion of the energy of oxidation reactions in mitoo chondria have been discussed in the literature. The model of Mitchell [1] implies that the multienzyme phosphorylation system can work in a dissociated form, while the other model (by Williams) considers a supercomplex [2]. We have earlier demonstrated that(More)
Investigation of the chaperonin encoded by gene 146 of bacteriophage EL Pseudomonas aeruginosa that we characterized earlier has been continued. To reveal the mechanism of its functioning, new recombinant substrate proteins, fragments of gene product (gp) 183 containing the lysozyme domain were prepared. Their interaction with gp146 was studied. The(More)
Temperature-induced conformational changes of reduced and oxidized HspB1 crosslinked by disulfide bond between single Cys137 of neighboring monomers were analyzed by means of different techniques. Heating of reduced HspB1 was accompanied by irreversible changes of Trp fluorescence, whereas oxidized HspB1 underwent completely reversible changes of(More)
The present paper reports karyotypic data for 76 individuals of the common shrew, Sorex araneus L., collected from 10 geographic sites in Belarus. We revealed two vast areas of polymorphism for diagnostic chromosomes of karyotypic races Białowieża (gr, hn, ik, mp) and Kiev (gm, hi, ko) with low frequency of metacentrics. The frequencies of the Białowieża(More)
300 In the last Ice Age, the forest vegetation was pree served for tens of thousands of years as small isolated refugia for wood species [1]. These refugia also housed forest rodent and insectivorous species, as demonn strated by the small percentage of bone fossils of mamm malian forest species (1–2%) at the localities of the late Pleistocene tundra and(More)
The common shrew, Sorex araneus, is characterized by an exclusive polymorphism for Robertsonian translocations. Karyotypes of more than 70 chromosomal races of S. araneus differ from each other in composition and number of metacentrics resulting from Rb translocations which involve ten pairs of acrocentric chromosomes. The karyotype with ten pairs of(More)
In this work the genetic variability of the common shrew populations Sorex araneus L. in Eastern Europe was studied via mitochondrial gene cyt b sequencing. A total of 82 sequences of the mitochondrial gene cyt b with a length of 953 basepairs were analyzed, including five chromosome races in a continuous natural area in forest zone and two races which(More)
The contact points of four karyotypic races (St. Petersburg, Moscow, Seliger and West Dvina) of the common shrew Sorex araneus L. were studied at the Valdai Hills (European Russia) in an area unimpeded by geographic barriers. The populations of the races are separated by narrow hybrid zones that represent the most complex heterozygous hybrid karyotypes. At(More)