共查询到20条相似文献,搜索用时 31 毫秒
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V S Grechishko V N Medvedkin N P Zapevalova R Jung Iu V Mitin 《Bioorganicheskaia khimiia》1987,13(11):1465-1473
Fragments (1-9), (10-14), (15-20), (21-26), (29-33) and (34-40) of a tetracontapeptide hypothetical ancestor of calcium-binding proteins were synthesised with the use of pentafluorophenyl esters. Formation of a succinimide derivative was detected during synthesis of fragment (15-20) containing Asp(OBzl)-Gly sequence. To avoid this side process, tert-butylprotecting group was used instead of benzyl group. alpha-Carboxyls of C-terminal amino acids were protected by phenacyl group. 相似文献
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《Basic and Applied Ecology》2014,15(3):277-278
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《Inorganica chimica acta》1988,146(2):187-191
Lithium penta(cyano-13C)nitrosylruthenate (2-), Li2[Ru(13CN)5NO], in which the anion is the ruthenium analogue of the nitroprusside ion, has been synthesized at 90% isotopic enrichment, and characterized spectroscopically. Despite the very high level of 13C enrichment, no two-bond coupling 2J(13Cax-Ru13Ceq) was detected in the high-frequency 13C NMR spectrum of Li2[Ru(13CN)5NO], nor was any such coupling observed in Li4[Ru(13CN)5(15NO2)] although both two-bond couplings to 15N, 2J(13Cax-Ru15NO2) and 2J(13CeqRu15N) were observed. Li2[Ru(13CN)5(14NO)] reacted with excess of Li[15NO2] to yield Li4[Ru(13CN)5(15NO2)] only: no Li2[Ru(13CN)5(15NO)] was observed. Li4[Ru(13CN)5(14NO2)] however showed no exchange with Li[15NO2]. While [Ru(CN)5NO]2− reacted with both OH− and SH− in reactions similar to those of [Fe(CN)5NO]2−, no reactions were detected between [Ru(CN)5NO]2− and piperidine, [CH(CN)2]−, [CH(COCH3)2]−, MeS−, or [S2O4]2−, all of which are known to react readily with [Fe(CN)5NO]2− 相似文献
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The genes for three convertases, PC1 (Nec-1), PC2 (Nec-2), and furin (Fur), have been regionally localized on chromosomes 13, 2, and 7, respectively, by interspecific backcross analysis. These results refine previous localizations by in situ hybridization as well as confirm and extend known regions of homology between mouse and human chromosomes. 相似文献
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《Basic and Applied Ecology》2008,9(6):793
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A Tominaga S Saito S Kohno K Sakurai Y Hayakawa R Noyori 《Microbiology and immunology》1990,34(9):737-747
Dephosphorylated "core" of 2',5'-oligoadenylate (2-5A) dimer (A2'p5'A), exogenously added to nonpermeabilized FL cells, inhibited the multiplication of Sindbis virus and vesicular stomatitis virus (VSV). The compound was shown to inhibit viral protein synthesis. The addition of A2'p5'A at the early stage of viral replication was more effective than that at the late stage. In contrast with the core, phosphorylated 2-5A (p5'A2'p5'A and ppp5'A2'p5'A) and 2-5A analogs containing cordycepin (3'-deoxyadenosine) did not show such antiviral effects. The rate of uptake of [3H]ppp5'A 2'p5'A into acid-soluble and acid-insoluble fractions, especially into the acid-insoluble fraction, was faster than that of [3H]A2'p5'A. These results suggest that the difference of antiviral activity between A2'p5'A and ppp5'A2'p5'A does not result from the different rate of uptake by cells, but from the different rate of from acid-soluble to acid-insoluble fractions. 相似文献
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David Jablonski 《Journal of evolutionary biology》1992,5(2):357-359
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Rainer Waldhardt 《Basic and Applied Ecology》2012,13(5):487