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Behavioral polymorphism estimated by the expression of the defensive reaction towards humans has been studied in farm-bred American minks and sables with different color types. Most animals (both minks and sables) from farm populations displayed passive defensive behavior towards humans in the standard hand catch test. Coat color genes have been found to have pleiotropic effects; they influence both the penetrance and expressivity of domestication behavior: in animals with aberrant color types (both sapphire minks and white-and-black sables), the proportion of animals with domestication behavior and the expressivity of this behavior are significantly higher (p <0.01 and p < 0.001, respectively). 相似文献
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Occurrence and diversity of mesophilic Shewanella strains isolated from the North-West Pacific Ocean 总被引:1,自引:0,他引:1
Ivanova EP Sawabe T Zhukova NV Gorshkova NM Nedashkovskaya OI Hayashi K Frolova GM Sergeev AF Pavel KG Mikhailov VV Nicolau DV 《Systematic and applied microbiology》2003,26(2):293-301
Although bacteria of the genus Shewanella belong to one of the readily cultivable groups of "Gammaproteobacteria", little is known about the occurrence and abundance of these microorganisms in the marine ecosystem. Studies revealed that of 654 isolates obtained from marine invertebrates (ophiuroid Amphiopholis kochii, sipuncula Phascolosoma japonicum, and holothurian Apostichopus japonicus, Cucumaria japonica), seawater and sediments of the North-West Pacific Ocean (i.e. the Sea of Japan and Iturup Is, Kurile Islands), 10.7% belonged to the genus Shewanella. The proportion of viable Shewanella species varied from 4% to 20% depending on the source of isolation. From the isolation study, representative strains of different phenotypes (from seventy presumptive Shewanella strains) were selected for detailed characterization using phenotypic, chemotaxonomic, and phylogenetic testing. 16S rDNA sequence-based phylogenetic analysis confirmed the results of tentative identification and placed the majority of these strains within only a few species of the genus Shewanella with 98-99% of 16S rDNA sequences identity mainly with S. japonica and S. colwelliana, suggesting that the strains studied might belong to these species. Numerically dominant strains of S. japonica were metabolically active and produced proteinases (gelatinases, caseinases), lipases, amylases, agarases, and alginases. Shewanella strains studied demonstrated weak antimicrobial and antifungal activities that might be an indication of their passive role in the colonization on living and non-living surfaces. 相似文献
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Sipina LV Bukurova YA Nikitina IG Krasnov GS Sergeev SA Lisitsyn NA Karpov VL Beresten SF 《Biochemistry. Biokhimii?a》2010,75(9):1148-1152
A modified method of proteome comparative analysis based on preliminary removal of cell structural proteins by extraction
using salt buffer and subsequent separation of extracts by two-dimensional gel electrophoresis was developed. Identification
of differentially expressed proteins by mass spectrometry has revealed three proteins with noticeably increased level of synthesis
in most samples of papillary thyroid tumors compared to normal tissues. An increase in ubiquitin content was found for the
first time. Oncomarker search efficiencies by two-dimensional gel electrophoresis and bioinformatic search were compared. 相似文献
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Seasonal dynamics and changes in the general condition of the Italian locust population in the southeast of the West Siberian Plain that were observed throughout the 20th century are characterized in this paper. It was demonstrated that during the last outbreaks of mass reproduction of this species, dominant were individuals transitional from typical gregarious to typical solitary ones. A complicated undulating picture of long-term spatial redistribution of maximum and minimum densities of the Italian locust is detected for the first time, and drastic dynamic differences between neighboring groups of its local populations are shown. The regularities found are in discrepancy with the traditionally accepted unidirectional character of long-term changes in the species numbers within one physiographic region. 相似文献
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A. M. Krasnyi A. I. Sergeev L. P. Dolgacheva E. L. Nikiforov V. P. Zinchenko 《Biochemistry (Moscow) Supplemental Series A: Membrane and Cell Biology》2010,4(1):90-96
Precipitation of Ehrlich ascites tumor cells (EATC) by centrifugation causes ATP secretion. ATP secretion is accompanied by
an increase of calcium concentration in the cytosol and persists for a long time (minutes) after centrifugation during the
storage of cells at a low temperature. During prolonged storage (for more than 1.5 h), the concentration of extracellular
ATP decreases to the level of ∼100 nM due to termination of secretion and ATP hydrolysis by surface ATPases. The rate of ATP
hydrolysis exponentially falls with the temperature decrease from 36 to 8°C. ARL67156, a selective inhibitor of E-NTPDase-1,
effectively suppresses the extracellular ATP hydrolysis. The intensity of ATP secretion does not correlate with the calcium
ions concentration in the cytosol and Ca2+ mobilization from endoplasmic reticulum but correlates with the intensity of Ca2+ influx into the cells. The temperature dependences of ATP secretion intensity and Ca2+ entry rate coincide. 相似文献
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