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1.
N A Chikaev I A Nazarenko S S Bogachev E G Malygin 《Biokhimii?a (Moscow, Russia)》1987,52(9):1454-1460
The influence of the primary structure of polydeoxyribonucleotides on the rate of hydrolysis with exonuclease III from Bacillus amyloliquefaciens and Escherichia coli was investigated. The substrates used were synthetic oligodeoxyribonucleotides and pBR 322 DNA fragments labeled with 32P at the 5'-termini of one of the chains. According to the data from polyacrylamide gel electrophoresis performed under denaturing conditions, the hydrolysis of these substrates by unsaturating concentrations of B. amyloliquefaciens and E. coli exonuclease III proceeds with several reproducible "stops". The decrease of the reaction rate was shown to take place just before the pyrimidine blocks in the digested DNA chain. 相似文献
2.
P A Belavin Iu A Gorbunov E G Malygin N I Rechkunova S Kh Degtiarev 《Bioorganicheskaia khimiia》1989,15(3):417-418
The specificity of DNA methylase M. FokI towards oligonucleotides containing sequence 5'...GGATG.../3'...CCTAC... was investigated, and N6-methyladenine in the GGATG chain was shown to be the only product of the modification. 相似文献
3.
E G Malygin V V Zinov'ev Iu A Gorbunov S G Popov N I Rechkunova 《Biokhimii?a (Moscow, Russia)》1988,53(10):1639-1647
The interaction of Eco dam methylase with various synthetic oligonucleotide substrates was investigated. The "imperfect" duplexes contained a normal GATC recognition sequence in one chain of the enzyme recognition site and had some defects in the complementary chain, i.e., the absence of one or several nucleotide residues or the presence of S-methyl thiophosphate groups at the 3'-termini. The 3'-S-methyl thiophosphate residue has the same effect on the methylation of oligonucleotide complexes as does the absence of internucleotide phosphate in the analogous complexes. The presence of both GA dinucleotides in the recognition site is necessary for a productive enzyme-substrate interaction. The experimental data suggest that Eco dam methylase does form a symmetrical enzyme-substrate complex which is similar to that formed by type II restriction enzymes. 相似文献
4.
S N Shchelkunov O I Riazankina P B Gashnikov A B Totmenin V E Chizhikov E G Malygin 《Molekuliarnaia biologiia》1991,25(2):396-404
Two genetics markers: the herpes simplex virus thymidine kinase and Escherichia coli beta-galactosidase genes were inserted into the 36K protein gene of vaccinia virus located in a HindIII-P DNA fragment. An unstability of recombinant viruses with Lac(+)-phenotype were discovered. A mechanism of viruses unstable variants formation was proposed, it was confirmed by the results of hybridisation analyses of virus recombinant genomes. The importance of a late nonstructural 36K protein gene for virus reproduction was demonstrated. 相似文献
5.
Partial hepatectomy leads to both increasing of natural cell-mediated activity and sensibilization level (SL) of splenocytes of hepatectomized mice towards antigens of the syngeneic liver. The wave-like variability of SL was shown with sharp increase at 3, 6 and 9 days after operation. Natural killer activity was elevated on the 2nd and 10th days with a significant decrease on the 3-4th days after operation. It is assumed that the variability in the functional activity of splenocytes under study may characterized splenocytes of different populations. 相似文献
6.
L N Iashina T A Ponomareva N I Rechkunova V V Zinov'ev E G Malygin 《Bioorganicheskaia khimiia》1986,12(6):764-770
The specificity of DNA X dye binding was studied. Antibiotic distamycin A was bound most strongly to the DNA sequences composed of three or more neighboring A X T pairs. Acrichin and 7-aminoacrichin proved to be weak specific inhibitors binding predominantly within the A X T regions. 相似文献
7.
Recombinant Human Ribosomal Protein S16: Expression,Purification, Refolding,and Structural Stability
The cDNA of human ribosomal protein S16 was cloned into the expression vector pET-15b. Large-scale production of the recombinant protein was carried out in E. coli cells and highly purified protein was isolated. A method for refolding the protein from inclusion bodies was optimized. The secondary structure content of the refolded protein was analyzed by CD spectroscopy. It was found that 21 +/- 4% of the amino acid sequence of the protein forms alpha-helices and 24 +/- 3% is in beta-strands. The protein structure stability was studied at various pH values and urea concentrations. The protein is quickly denatured at pH above 8.0, whereas increasing of urea concentration causes slow unfolding of the protein. 相似文献
8.
Natural killer activity of pregnant women's peripheral blood lymphocytes and of cord blood was investigated. 3H-uridine labeled K-562 and human embryo fibroblasts (HEF) were used as target cells in cytotoxic test. The results of competitive inhibition test led us to a conclusion about the presence of some common K-562 and HEF surface structures recognized by NK cells. It was shown that the decline of NK activity of pregnant women and a low NK activity of cord blood were not associated with the influence of T-lymphocytes or adherent cells. 相似文献
9.
Vasilyeva A. E. Yanshina D. D. Karpova G. G. Malygin A. A. 《Russian Journal of Bioorganic Chemistry》2019,45(6):758-765
Russian Journal of Bioorganic Chemistry - The ribosomal protein uS15 is one of the key proteins forming the small (40S) ribosomal subunit structure around the central domain of 18S rRNA. According... 相似文献
10.