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701.
702.
Otsuki Tetsuji; Ota Toshio; Nishikawa Tetsuo; Hayashi Koji; Suzuki Yutaka; Yamamoto Jun-ichi; Wakamatsu Ai; Kimura Kouichi; Sakamoto Katsuhiko; Hatano Naoto; Kawai Yuri; Ishii Shizuko; Saito Kaoru; Kojima Shin-ichi; Sugiyama Tomoyasu; Ono Tetsuyoshi; Okano Kazunori; Yoshikawa Yoko; Aotsuka Satoshi; Sasaki Naokazu; Hattori Atsushi; Okumura Koji; Nagai Keiichi; Sugano Sumio; Isogai Takao 《DNA research》2005,12(2):117-126
We have developed an in silico method of selection of humanfull-length cDNAs encoding secretion or membrane proteins fromoligo-capped cDNA libraries. Fullness rates were increased toabout 80% by combination of the oligo-capping method and ATGpr,software for prediction of translation start point and the codingpotential. Then, using 5'-end single-pass sequences, cDNAs havingthe signal sequence were selected by PSORT (signal sequencetrap). We also applied secretion or membrane protein-relatedkeyword trap based on the result of BLAST search againstthe SWISS-PROT database for the cDNAs which could not be selectedby PSORT. Using the above procedures, 789 cDNAs were primarilyselected and subjected to full-length sequencing, and 334 ofthese cDNAs were finally selected as novel. Most of the cDNAs(295 cDNAs: 88.3%) were predicted to encode secretion or membraneproteins. In particular, 165(80.5%) of the 205 cDNAs selectedby PSORT were predicted to have signal sequences, while 70 (54.2%)of the 129 cDNAs selected by keyword trap preservedthe secretion or membrane protein-related keywords. Many importantcDNAs were obtained, including transporters, receptors, andligands, involved in significant cellular functions. Thus, anefficient method of selecting secretion or membrane protein-encodingcDNAs was developed by combining the above four procedures. 相似文献
703.
Junya Shirai Yoshihide Tomata Mitsunori Kono Atsuko Ochida Yoshiyuki Fukase Ayumu Sato Shinichi Masada Tetsuji Kawamoto Kazuko Yonemori Ryoukichi Koyama Hideyuki Nakagawa Masaharu Nakayama Keiko Uga Akira Shibata Keiko Koga Toshitake Okui Mikio Shirasaki Robert Skene Satoshi Yamamoto 《Bioorganic & medicinal chemistry》2018,26(2):483-500
704.
Attenuated accumulation of regulatory T cells and reduced production of interleukin 10 lead to the exacerbation of tissue injury in a mouse model of acute respiratory distress syndrome 下载免费PDF全文
Masahiko Toyama Daisuke Kudo Tetsuji Aoyagi Keiko Ishii Emi Kanno Mitsuo Kaku Shigeki Kushimoto Kazuyoshi Kawakami 《Microbiology and immunology》2018,62(2):111-123
705.
706.
Shuhei Tanida Kaoru Akita Akiko Ishida Yugo Mori Munetoyo Toda Mizue Inoue Mariko Ohta Masakazu Yashiro Tetsuji Sawada Kosei Hirakawa Hiroshi Nakada 《The Journal of biological chemistry》2013,288(44):31842-31852
Because MUC1 carries a variety of sialoglycans that are possibly recognized by the siglec family, we examined MUC1-binding siglecs and found that Siglec-9 prominently bound to MUC1. An immunochemical study showed that Siglec-9-positive immune cells were associated with MUC1-positive cells in human colon, pancreas, and breast tumor tissues. We investigated whether or not this interaction has any functional implications for MUC1-expressing cells. When mouse 3T3 fibroblast cells and a human colon cancer cell line, HCT116, stably transfected with MUC1cDNA were ligated with recombinant soluble Siglec-9, β-catenin was recruited to the MUC1 C-terminal domain, which was enhanced on stimulation with soluble Siglec-9 in dose- and time-dependent manners. A co-culture model of MUC1-expressing cells and Siglec-9-expressing cells mimicking the interaction between MUC1-expressing malignant cells, and Siglec-9-expressing immune cells in a tumor microenvironment was designed. Brief co-incubation of Siglec-9-expressing HEK293 cells, but not mock HEK293 cells, with MUC1-expressing cells similarly enhanced the recruitment of β-catenin to the MUC1 C-terminal domain. In addition, treatment of MUC1-expressing cells with neuraminidase almost completely abolished the effect of Siglec-9 on MUC1-mediated signaling. The recruited β-catenin was thereafter transported to the nucleus, leading to cell growth. These findings suggest that Siglec-9 expressed on immune cells may play a role as a potential counterreceptor for MUC1 and that this signaling may be another MUC1-mediated pathway and function in parallel with a growth factor-dependent pathway. 相似文献
707.
Yuki Fujii Shiho Tanaka Manami Otsuki Yasushi Hoshino Haruka Endo Ryoichi Sato 《Molecular biotechnology》2013,54(3):888-899
Improvement of the activity and insecticidal spectrum of cloned Cry toxins of Bacillus thuringiensis should allow for their wider application as biopesticides and a gene source for gene-modified crops. The insecticidal activity of Cry toxins depends on their binding to the receptor. Therefore, as a model, we aimed to generate improved binding affinity mutant toxins against Bombyx mori cadherin-like receptor (BtR175) using methods of directed evolution with the expectation of insecticidal activity improved mutants. Four serial amino acid residues of 439QAAG442 or 443AVYT446 of Cry1Aa were replaced with random amino acids and were displayed on the T7 phage for library construction. Through five cycles of panning of the phage libraries using BtR175, 11 mutant phage clones were concentrated, and mutant toxin sequences were confirmed. The binding affinities of the three mutants were 42-, 15-, and 13-fold higher than that of the wild type, indicating that mutants with improved binding affinity to cadherin can be easily selected from randomly replaced loop 3 mutant libraries using directed evolution. We discuss the development of a genetic engineering method based on directed evolution to improve the binding affinity of Cry toxin to receptors. 相似文献
708.
Ayumi Katayama Tomonori Kume Hikaru Komatsu Taku M. Saitoh Mizue Ohashi Michiko Nakagawa Masakazu Suzuki Kyoichi Otsuki Tomo’omi Kumagai 《Journal of plant research》2013,126(4):505-515
To clarify characteristics of carbon (C) allocation in a Bornean tropical rainforest without dry seasons, gross primary production (GPP) and C allocation, i.e., above-ground net primary production (ANPP), aboveground plant respiration (APR), and total below-ground carbon flux (TBCF) for the forest were examined and compared with those from Amazonian tropical rainforests with dry seasons. GPP (30.61 MgC ha?1 year?1, eddy covariance measurements; 34.40 MgC ha?1 year?1, biometric measurements) was comparable to those for Amazonian rainforests. ANPP (6.76 MgC ha?1 year?1) was comparable to, and APR (8.01 MgC ha?1 year?1) was slightly lower than, their respective values for Amazonian rainforests, even though aboveground biomass was greater at our site. TBCF (19.63 MgC ha?1 year?1) was higher than those for Amazonian forests. The comparable ANPP and higher TBCF were unexpected, since higher water availability would suggest less fine root competition for water, giving higher ANPP and lower TBCF to GPP. Low nutrient availability may explain the comparable ANPP and higher TBCF. These data show that there are variations in C allocation patterns among mature tropical rainforests, and the variations cannot be explained solely by differences in soil water availability. 相似文献
709.
Satsuki Otsuki Shinichi Nishimura Hisae Takabatake Kozue Nakajima Yasuaki Takasu Toru Yagura Yuki Sakai Akira Hattori Hideaki Kakeya 《Bioorganic & medicinal chemistry letters》2013,23(6):1608-1611
Irreversible modification is one of the most promising strategies to identify cellular receptors of bioactive small molecules. Here we report that receptor proteins can be chemically tagged using a 5-sulfonyl tetrazole probe. 5-Sulfonyl tetrazole easily accepted nucleophilic attack of thiol groups, while 5-sulfinyl tetrazole did not. These functional groups were introduced into probe molecules of a natural product. Cyclosporine A, an immunosuppressant produced by a microbe, was derivatized to possess 5-sulfonyl tetrazole and a tag group, which enabled chemical tagging of cyclophilin A, the cellular receptor of cyclosporine A. Cyclosporine A derivative possessing 5-sulfinyl tetrazole could not tag cyclophilin A. This technique will allow efficient identification of cellular receptors of bioactive small molecules. 相似文献
710.
Naoyoshi Kumakura Hiroka Otsuki Masayuki Tsuzuki Atsushi Takeda Yuichiro Watanabe 《PloS one》2013,8(11)
The RNA exosome is a multi-subunit complex that is responsible for 3ʹ to 5ʹ degradation and processing of cellular RNA. Rrp44/Dis3 is the catalytic center of the exosome in yeast and humans. However, the role of Rrp44/Dis3 homologs in plants is still unidentified. Here, we show that Arabidopsis AtRRP44A is the functional homolog of Rrp44/Dis3, is essential for plant viability and is required for RNA processing and degradation. We characterized AtRRP44A and AtRRP44B/SOV, two predicted Arabidopsis Rrp44/Dis3 homologs. AtRRP44A could functionally replace S. cerevisiae Rrp44/Dis3, but AtRRP44B/SOV could not. rrp44a knock-down mutants showed typical phenotypes of exosome function deficiency, 5.8S rRNA 3ʹ extension and rRNA maturation by-product over-accumulation, but rrp44b mutants did not. Conversely, AtRRP44B/SOV mutants showed elevated levels of a selected mRNA, on which rrp44a did not have detectable effects. Although T-DNA insertion mutants of AtRRP44B/SOV had no obvious phenotype, those of AtRRP44A showed defects in female gametophyte development and early embryogenesis. These results indicate that AtRRP44A and AtRRP44B/SOV have independent roles for RNA turnover in plants. 相似文献