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991.
Paul F. Torrence Erik De Clercq James A. Waters Bernhard Witkop 《Biochemical and biophysical research communications》1975,62(3):658-664
Polylaurusin[poly(L) or “polyformycin B”] forms double-stranded complexes with polycytidylic acid (poly(C)) and with poly(5-bromocytidylic acid) [poly(br5C)] with Tm's of 46.5° (0.2 NaCl, pH 7) and 72.5° (0.15 M NaCl, pH 7), respectively. Both complexes fail to provide antiviral resistance (against vesicular stomatitis virus in primary rabbit kidney cells) or to induce interferon in “superinduced” primary rabbit kidney cells, even though they fulfill all previously recognized requirements for effective interferon inducers. 相似文献
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James P. Kehrer 《Cell biology and toxicology》2010,26(2):83-89
Survival and apoptosis signaling pathways are altered concomitantly in response to numerous endogenous and exogenous stressors.
The lipocalin family of small soluble proteins has been implicated in modulating apoptosis. However, the overall effect of
these proteins has been variable, showing both pro- and anti-apoptotic activities. The goal of this minireview is to summarize
the studies on lipocalins and apoptosis and consider what roles lipocalin-2 may play in cell death and survival. 相似文献
995.
James Houk 《American anthropologist》1998,100(1):206-206
Anthropology of Religion:. Handbook. Stephen D. Glazier. ed. Westport, CT: Greenwood Press, 1997. 542 pp. 相似文献
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James W. Wood 《American anthropologist》1980,82(1):181-182
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Data obtained from studies on the origin and development of hemopoietic cells in several classes of vertebrate embryos argue for two distinct sources of hemopoietic cells, the intraembryonic dorsal lateral plate and the extraembryonic ventral blood island/yolk sac. In the present study, a stage by stage comparison of the hemopoietic potential of both of these regions was made during development of the frog, Rana pipiens. Either dorsal lateral plate or ventral blood island mesoderm was reciprocally transplanted between cytogenetically labeled triploid and diploid embryos. The ratio of donor-derived cells to host-derived cells (labeling index) was determined from Feulgen-stained DNA measurements of cells harvested from hemopoietic organs of young larvae. Blood island transplants consistently resulted in larvae with positive labeling of the circulating blood. Transplanted dorsal mesoderm supplied mesonephric granulocytes and thymocytes, but not circulating erythrocytes to larvae. However, the contribution of dorsal mesoderm to larval hemopoiesis fluctuated with respect to embryonic stage at transplantation. 相似文献