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排序方式: 共有121条查询结果,搜索用时 15 毫秒
1.
Perfusion of isolated rat hearts with a phosphocreatine (10(-4) M) containing solution to which strophanthin or KCl had been added up to a concentration of 27 mM as well as Ca2+ depletion decreased phosphocreatine concentration in the perfusate with a simultaneous increase in creatine and phosphocreatine concentrations in the myocardium. Neither high extracellular concentrations of Na+ (200 mM), nor phosphocreatine increased creatine and phosphocreatine levels in the myocardium. The effect of high sodium perfusion media was completely reversed by strophanthin. Phosphocreatine decreased the lactate content in the perfusate. Strophanthin or potassium chloride enhanced the effect of phosphocreatine on the lactate release. Conversely, creatine augmented the lactate content in the perfusate. A high specificity of the phosphocreatine effect on the myocardium independently of the ionic composition of the perfusate was postulated. A mechanism of protective effects of phosphocreatine and high sodium perfusion media on "calcium paradox" is proposed. 相似文献
2.
Ca2(+)-ATPase of sarcoplasmic reticulum was reconstituted in the proteoliposomes by the salting out procedure. Triton X-100, C12E8 and Lubrol PX were used for the solubilization of the Ca2(+)-ATPase. Using fluorescent probes (diS-C3-(5), chlortetracycline) as well pH-measuring method, the functional of the reconstituted Ca2(+)-ATPase was comparatively studied in three types of proteoliposomes. The efficiency of Ca2(+)-ATPase grew in the following detergent order: Triton X-100, C12E8, Lubrol PX. 相似文献
3.
Iu B Alakhov M A Bundule Iu P Bundulis L M Vinokurov V P Kozlov 《Bioorganicheskaia khimiia》1983,9(3):304-314
Peptides obtained as a result of cyanogen bromide cleavage of the G-factor have been studied. All 12 peptides embracing the whole structure of fragment T4 have been isolated. For their amino acid sequence determination, cyanogen bromide peptides have been further cleaved with trypsin, chymotrypsin, thermolysin, staphylococcal glutamic protease and BNPS-skatole. The complete primary structure of 9 from 12 cyanogen bromide peptides has been determined. 相似文献
4.
The amino acid sequence of the C-terminal domain of the elongation factor G (EF-G) has been studied. The polypeptide chain of the domain consists of 228 amino acid residues, and contains no tryptophan or cysteine residues. To determine its structure, the peptides obtained as a result of the fragment digestion by staphylococcal glutamic protease, cyanogen bromide cleavage, and tryptic hydrolysis of the fragment modified by maleic anhydride have been analyzed, as well as peptides obtained after hydrolyses of cyanogen bromide fragments with chymotrypsin, thermolysin and trypsin. 相似文献
5.
M. M. Yurinskaya S. Y. Funikov M. B. Evgen’ev M. G. Vinokurov 《Doklady. Biochemistry and biophysics》2016,469(1):239-243
The effect of exogenous heat shock protein HSP70 and lipopolysaccharide (LPS) on the production of reactive oxygen species (ROS), TNFα secretion, and mRNA expression by human neuroblastoma SK-N-SH cells. It was shown that exogenous HSP70 protects neuroblastoma cells from the action of LPS. The protection mechanism of HSP70 includes a reduction in the production of ROS and TNFα and a decrease in the expression of TLR4 and IL-1β mRNA in SK-N-SH cells induced by LPS. 相似文献
6.
V V Alabovski? A I Dmitrashchuk A A Vinokurov 《Rossi?skii fiziologicheski? zhurnal imeni I.M. Sechenova / Rossi?skaia akademiia nauk》1999,85(2):246-254
The findings reveal that the degree of myocardial damage in the "calcium paradox" does not depend on the contracture strength, that the contracture attenuation due to a decreased concentration in the Ca-free medium is not equal to the cardiocytes protection as compared with other means. Mg2+ and the studied means of myocardial protection seem to play a major role in assessment of the "calcium paradox" development and explain the difference in results of the hyposodium medium effects in the "calcium paradox". 相似文献
7.
Gorokhovatsky AY Rudenko NV Marchenkov VV Skosyrev VS Arzhanov MA Burkhardt N Zakharov MV Semisotnov GV Vinokurov LM Alakhov YB 《Analytical biochemistry》2003,313(1):68-75
Here we describe a homogeneous assay for biotin based on bioluminescence resonance energy transfer (BRET) between aequorin and enhanced green fluorescent protein (EGFP). The fusions of aequorin with streptavidin (SAV) and EGFP with biotin carboxyl carrier protein (BCCP) were purified after expression of the corresponding genes in Escherichia coli cells. Association of SAV-aequorin and BCCP-EGFP fusions was followed by BRET between aequorin (donor) and EGFP (acceptor), resulting in significantly increasing 510 nm and decreasing 470 nm bioluminescence intensity. It was shown that free biotin inhibited BRET due to its competition with BCCP-EGFP for binding to SAV-aequorin. These properties were exploited to demonstrate competitive homogeneous BRET assay for biotin. 相似文献
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9.
Rudenko NV Sinegina LL Arzhanov MA Ksenzenko VN Ivashina TV Morenkov OS Shaloiko LA Vinokurov LM 《Journal of biochemical and biophysical methods》2007,70(4):605-611
The effective new variant of "sandwich" bioluminescent enzyme immunoassay (BEIA) for the sensitive detection of glycoprotein B (gB) of pseudorabies virus (PrV) was presently developed. The high affinity interaction of barnase-barstar protein pair and photoprotein obelin as bioluminescent marker were for the first time successfully applied to BEIA development. Preliminary the two monoclonal antibodies, 11/5 and 34/2, were raised against gB for ELISA PrV detection. Presently we used the same immuno-"sandwich" principle for BEIA. To do this the two different bioconjugates were elaborated. Recombinant barnase was chemically conjugated with monoclonal anti-PrV's gB IgG, and also barstar was fused in frame to obelin. The characteristics of BEIA method have been compared to ELISA PrV detection. We have shown the proposed here gB-BEIA was 40-fold more sensitive as opposed to gB-ELISA test. The construction might have a broad promise in multiple potential immunological applications. 相似文献
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