Anna S. Ershova

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Standard Affymetrix technology evaluates gene expression by measuring the intensity of mRNA hybridization with a panel of the 25-mer oligonucleotide probes, and summarizing the probe signal intensities by a robust average method. However, in many cases, signal intensity of the probe does not correlate with gene expression. This could be due to the(More)
For the first time in the last 20-50 years foci of tick-borne relapsing fever have been surveyed in the western Pamirs. Settlements in the Piandzha valley were shown to be (as in the 1930s and 1960s) affected by Ornithodoros papillipes Bir., the carrier of the infection. Though the number of ticks is still rather high, it is nowadays considerably reduced.(More)
Bone morphogenetic protein-2 (rhBMP-2) is an osteoinductive protein factor which plays a dominant role in growth and regeneration of bone tissue. In clinical practice, bone grafting materials on the basis of rhBMP-2 are widely applied; the Russian analogues of similar materials have not been produced yet. The fragment of the bmp-2 gene encoding a mature(More)
Prokaryotic restriction-modification (R-M) systems defend the host cell from the invasion of a foreign DNA. They comprise two enzymatic activities: specific DNA cleavage activity and DNA methylation activity preventing cleavage. Typically, these activities are provided by two separate enzymes: a DNA methyltransferase (MTase) and a restriction endonuclease(More)
Avoidance of palindromic recognition sites of Type II restriction-modification (R-M) systems was shown for many R-M systems in dozens of prokaryotic genomes. However the phenomenon has not been investigated systematically for all presently available genomes and annotated R-M systems. We have studied all known recognition sites in thousands of prokaryotic(More)
The conserved hydrophobic core is an important feature of a family of protein domains. We suggest a procedure for finding and the analysis of conserved hydrophobic cores. The procedure is based on using an original program called CluD (http://monkey.belozersky.msu.ru/CluD/cgi-bin/hftri.pl). Conserved hydrophobic cores of several families including(More)
For the first time a possibility of the gamasina mites' O. bacoti participation in Lyme disease spirochetes' circulation has been demonstrated. It has been experimentally shown that Borrelia burgdorferi s.l. are received by O. bacoti, survive in them for at least 21 days and are transmitted to white mice through mites' bites. Mice's infestation has occurred(More)
The paper presents the results of repeated investigations in the tick relapsing fever nidus (TRF) conducted after a ten-year interval in Gava settlement situated in the foothill area of the Namangan Province of Uzbekistan. A considerable deterioration in the habitat conditions of the vector, Ornithodoros papillipes Bir., due to the intensified anthropogenic(More)
By using the guanidine-isothiocyanate test, the authors isolated a summary RNA preparation from Ixodes persulcatus salivary gland extracts. Activity products of the genes responsible for the expression of some salivary proteins were first identified using the RT-PCR. It has been shown that, firstly, I. persulcatus synthesizes at least 3 transcripts(More)