共查询到20条相似文献,搜索用时 234 毫秒
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G. S. Katrukha L. A. Baratova A. B. Silaev 《Cellular and molecular life sciences : CMLS》1968,24(6):540-541
.I.NH4OH , N
N
- - ,-. , . 相似文献
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I. A. Oyvin L. I. Uklonskaya P. J. Gaponiuk 《Cellular and molecular life sciences : CMLS》1967,23(7):555-556
, - Sr90 + Y90, , . - () . , , - . 相似文献
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H. K. Körner 《Cellular and molecular life sciences : CMLS》1976,32(4):463-464
Summary In the host-symbiont-cycle ofEuscelis plebejus and its bacterial symbionts each of both symbionts (a and t) appears in an infection form during the intraovarial transmission (adult female) as well as during the entrance into the mycetocytes (embryo) and in a vegetative form during the remaining time of the cycle.This work was supported in part by a grant from the Deutsche Forschungsgemeinschaft to ProfessorK. Sander, whom I thank for helpful discussions. 相似文献
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B. M. Carlson 《Cellular and molecular life sciences : CMLS》1968,24(10):1064-1066
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or fi y G1 , . 相似文献
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M. Tiecco M. Tingoli L. Testaferri D. Chianelli E. Wenkert 《Cellular and molecular life sciences : CMLS》1987,43(4):462-463
Summary The 3,3,4,4-tetrahydroxy-2,2-bipyridyl-N-oxide has been synthesized by dealkylation of the corresponding tetramethyl derivative. The chemical properties of this compound are identical to those reported for the minor fungal toxin ofCortinarius orellanus, orellinine.This work is part of the Tesi di Laurea of Miss Cinzia Pierucci. 相似文献
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qm -3- , 4° 0,15M NaCl, 5M , 4M - pH=7,6, ( 275–295 , –b
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, A
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, –A225). , +20° 0.15M H2PO4. 相似文献
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C. F. Nadler L. W. Turner R. S. Hoffmann L. Deutsch 《Cellular and molecular life sciences : CMLS》1973,29(7):893-894
-Spermophilus brunneus . , 13 18 ,S. brunneus S. townsendii mollis (2n=38) , , ; ;S. brunneus . S. brunneus , Spermophilus.
Supported by National Science Foundation Grants No. GB32114X and No. GB 29131X, and the Sprague Foundation. We thankD. Pozin for technical assistance. 相似文献
Supported by National Science Foundation Grants No. GB32114X and No. GB 29131X, and the Sprague Foundation. We thankD. Pozin for technical assistance. 相似文献
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V. M. Zhdanov V. I. Gavrilov S. M. Klimenko N. N. Bogomolova O. G. Andzhaparidze 《Cellular and molecular life sciences : CMLS》1973,29(2):235-236
, . , (180S, 1.42 140S, 133 /) . 相似文献
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G-protein signaling: back to the future 总被引:14,自引:0,他引:14
McCudden CR Hains MD Kimple RJ Siderovski DP Willard FS 《Cellular and molecular life sciences : CMLS》2005,62(5):551-577
Heterotrimeric G-proteins are intracellular partners of G-protein-coupled receptors (GPCRs). GPCRs act on inactive G·GDP/G heterotrimers to promote GDP release and GTP binding, resulting in liberation of G from G. G·GTP and G target effectors including adenylyl cyclases, phospholipases and ion channels. Signaling is terminated by intrinsic GTPase activity of G and heterotrimer reformation – a cycle accelerated by regulators of G-protein signaling (RGS proteins). Recent studies have identified several unconventional G-protein signaling pathways that diverge from this standard model. Whereas phospholipase C (PLC) is activated by Gq and G, novel PLC isoforms are regulated by both heterotrimeric and Ras-superfamily G-proteins. An Arabidopsis protein has been discovered containing both GPCR and RGS domains within the same protein. Most surprisingly, a receptor-independent G nucleotide cycle that regulates cell division has been delineated in both Caenorhabditis elegans and Drosophila melanogaster. Here, we revisit classical heterotrimeric G-protein signaling and explore these new, non-canonical G-protein signaling pathways.Received 21 October 2004; received after revision 20 November 2004; accepted 30 November 2004 相似文献
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U. Kerb H. -D. Berndt U. Eder R. Wiechert P. Buchschacher A. Furlenmeier A. Fürst M. Müller 《Cellular and molecular life sciences : CMLS》1971,27(7):759-761
Summary The synthesis of 3-acetoxy-16, 20-dihydroxy-4-methyl-18-nor-5, 14-pregnano[13,14-f]hexahydro-1, 4-oxazepin-3-one (20a) is described. 相似文献
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Summary The amino acid sequence was compared among the three allelic variants (allozymes) ofsn-glycerol-3-phosphate dehydrogenase inD. virilis, which are detected by one-dimensional electrophoresis. The GPDHf variant was different from the GPDHm by only one substitution of 68-lysine for asparagine; GPDHs differed from GPDHm by substitution of 127-glycine for arginine. No electrophoretically silent substitutions were found in a total of 352 amino acid residues. 相似文献
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C. F. Nadler R. S. Hoffmann A. Woolf 《Cellular and molecular life sciences : CMLS》1973,29(1):117-119
- . Ovis musimon (2n=54) O. orientalis (2n=54) - - -O. canadensis mexicana (2n=54) O. musimon x O. canadensis 12 - . 2 27 . - .
Supported by National Science Foundation Grant no. GB 32114X and the Sprague Foundation. We thank Dr. T. C. Hsu for assistance in making the chromosome preparations and for advice and encouragement. The Trustees of the Rachelwood Wildlife Research Preserve generously allowed the biopsy of specimens of their custody. Mr.Arthur Popham kindly provided the specimens from Iran while Dr.R. M. Robinson obtained biopsies from the desert sheep. 相似文献
Supported by National Science Foundation Grant no. GB 32114X and the Sprague Foundation. We thank Dr. T. C. Hsu for assistance in making the chromosome preparations and for advice and encouragement. The Trustees of the Rachelwood Wildlife Research Preserve generously allowed the biopsy of specimens of their custody. Mr.Arthur Popham kindly provided the specimens from Iran while Dr.R. M. Robinson obtained biopsies from the desert sheep. 相似文献
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Summary In the oocytes ofAplysia depilans it has been observed electronmicroscopically that gemmae or daughter-nucleoli separate from the nucleolus. These gemmae after having overcome the nuclear membrane, would aggregate together, even after transformation, into yolk globules. These observations seem to give plausibility to the hypothesis that there is a close relationship between production of ribonucleoproteic material by the nucleolus and yolk production. 相似文献
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S. Mauthe K. Bachmann K. L. Chambers H. J. Price 《Cellular and molecular life sciences : CMLS》1984,40(11):1280-1281
Summary The hairy achenes and yellow achenes characters are expressed only in peripheral fruits onMicroseris capitula. Segregation in interstrain hybrid D37 shows that the genes responsible for these characters respond independently to developmental regulation.Supported by grants Ba 536/7-7 from the Deutsche Forschungsgemeinschaft, and DEB 80-09427 from the National Science Foundation. 相似文献