In vivo and in vitro detection of the leader RNA of the histidine operon of Escherichia coli K-12.

abstract：:Isolated yeast mitochondria, which synthesize identifiable polypeptides identical to those made in vivo, have been used in an invitro system to study cytoplasmic control of mitochondrial protein synthesis. It has been found that protein synthesis in isolated mitochondria is dependent on an endogenous pool of cytoplasm...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Poyton RO,Kavanagh J

更新日期：1976-11-01 00:00:00

abstract：:The great mass extinctions of the fossil record were a major creative force that provided entirely new kinds of opportunities for the subsequent explosive evolution and diversification of surviving clades. Today, the synergistic effects of human impacts are laying the groundwork for a comparably great Anthropocene mas...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Jackson JB

更新日期：2008-08-12 00:00:00

abstract：:Messenger RNA from rat liver was partially purified by chromatography on cellulose on the basis of its poly(A) content. Microgram amounts of this RNA stimulate protein synthesis manyfold in a heterologous cell-free system, derived from Krebs ascites cells supplemented with reticulocyte initiation factors. The messenge...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Schutz G,Beato M,Feigelson P

更新日期：1973-04-01 00:00:00

abstract：:The semidwarf phenotype has been extensively selected during modern crop breeding as an agronomically important trait. Introduction of the semidwarf gene, semi-dwarf1 (sd1), which encodes a gibberellin biosynthesis enzyme, made significant contributions to the "green revolution" in rice (Oryza sativa L.). Here we repo...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Asano K,Yamasaki M,Takuno S,Miura K,Katagiri S,Ito T,Doi K,Wu J,Ebana K,Matsumoto T,Innan H,Kitano H,Ashikari M,Matsuoka M

更新日期：2011-07-05 00:00:00

abstract：:In the primary visual cortex (V1) of many mammalian species, neurons are spatially organized according to their preferred orientation into a highly ordered map. However, whether and how the various presynaptic inputs to V1 neurons are organized relative to the neuronal orientation map remain unclear. To address this i...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Zhang QF,Li H,Chen M,Guo A,Wen Y,Poo MM

更新日期：2018-05-29 00:00:00

abstract：:Hepatitis C virus (HCV) infects nearly 3% of the population of the world and is a major cause of liver disease. However, the mechanism whereby the virus targets the liver for infection remains unknown, because none of the putative cellular receptors for HCV are both expressed specifically in the liver and capable of b...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Gardner JP,Durso RJ,Arrigale RR,Donovan GP,Maddon PJ,Dragic T,Olson WC

更新日期：2003-04-15 00:00:00

abstract：:The thymus provides multiple microenvironments that are essential for the development and repertoire selection of T lymphocytes. The thymic cortex induces the generation and positive selection of T lymphocytes, whereas the thymic medulla establishes self-tolerance among the positively selected T lymphocytes. Cortical ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Ohigashi I,Zuklys S,Sakata M,Mayer CE,Zhanybekova S,Murata S,Tanaka K,Holländer GA,Takahama Y

更新日期：2013-06-11 00:00:00

abstract：:Nucleotide excision repair proteins have been implicated in genetic recombination by experiments in Saccharomyces cerevisiae and Drosophila melanogaster, but their role, if any, in mammalian cells is undefined. To investigate the role of the nucleotide excision repair gene ERCC1, the hamster homologue to the S. cerevi...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Sargent RG,Rolig RL,Kilburn AE,Adair GM,Wilson JH,Nairn RS

更新日期：1997-11-25 00:00:00

abstract：:The Max gene encodes a protein that interacts specifically with the Myc protein to form a heterodimer with high affinity for the specific cognate DNA binding site of Myc. Here we examine the expression of Max RNA in comparison to Myc RNA during cell growth and differentiation. Two species of RNA, a major 2.0- and a mi...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Wagner AJ,Le Beau MM,Diaz MO,Hay N

更新日期：1992-04-01 00:00:00

abstract：:A mixture of two recombinant plasmids was microinjected into mouse thymidine kinase-negative fibroblasts (L cells). One plasmid contained the thymidine kinase gene of herpes simplex virus type I and the other contained the human beta globin gene. Seven fibroblast colonies arising from injected cells incubated in hypox...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Anderson WF,Killos L,Sanders-Haigh L,Kretschmer PJ,Diacumakos EG

更新日期：1980-09-01 00:00:00

abstract：:Genomic RNA from the human prototype strain H of the hepatitis C virus (HCV-H) has been molecularly cloned and sequenced. The HCV-H sequence reported consists of 9416 nucleotides including the 5' and 3' untranslated regions. HCV-H shows 96% amino acid identity with the American isolate HCV-1 but only 84.9% with the Ja...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Inchauspe G,Zebedee S,Lee DH,Sugitani M,Nasoff M,Prince AM

更新日期：1991-11-15 00:00:00

abstract：:In savannas, predicting how vegetation varies is a longstanding challenge. Spatial patterning in vegetation may structure that variability, mediated by spatial interactions, including competition and facilitation. Here, we use unique high-resolution, spatially extensive data of tree distributions in an African savanna...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Staver AC,Asner GP,Rodriguez-Iturbe I,Levin SA,Smit IPJ

更新日期：2019-05-28 00:00:00

abstract：:Alfalfa mosaic virus (AlMV) coat protein is involved in systemic infection of host plants, and a specific mutation in this gene prevents the virus from moving into the upper uninoculated leaves. The coat protein also is required for different viral functions during early and late infection. To study the role of the co...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Spitsin S,Steplewski K,Fleysh N,Belanger H,Mikheeva T,Shivprasad S,Dawson W,Koprowski H,Yusibov V

更新日期：1999-03-02 00:00:00

abstract：:The TFIID transcription initiation complex is composed of TBP and multiple TAFs. Studies in unicellular systems indicate that TAF250 is required for progression through G(1)/S of the cell cycle and repression of apoptosis. Here we extend these in vivo studies by determining the developmental requirements for TAF250 in...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Wassarman DA,Aoyagi N,Pile LA,Schlag EM

更新日期：2000-02-01 00:00:00

abstract：:Animals are typically colonized by diverse bacterial symbionts, many of which are commensal and, in numerous cases, even essential for their host's proper development and growth. In exchange, the host must supply a sufficient array and quantity of nutrients to support the proliferation and persistence of its microbial...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Graf J,Ruby EG

更新日期：1998-02-17 00:00:00

abstract：:Purified RNA polymerase II (pol II) from the yeast Saccharomyces cerevisiae pauses without releasing at many locations during in vitro transcription. Pausing can be induced by intrinsic DNA sequence as well as by specific DNA bound proteins such as the RNA pol I termination factor, Reb1p, or lac repressor. Addition of...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Lang WH,Platt T,Reeder RH

更新日期：1998-04-28 00:00:00

abstract：:Metastatic colorectal cancer (mCRC) patients have poor overall survival despite using irinotecan- or oxaliplatin-based chemotherapy combined with anti-EGFR (epidermal growth factor receptor) drugs, especially those with the oncogene mutation of KRAS Metformin has been reported as a potentially novel antitumor agent in...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Xie J,Xia L,Xiang W,He W,Yin H,Wang F,Gao T,Qi W,Yang Z,Yang X,Zhou T,Gao G

更新日期：2020-06-09 00:00:00

abstract：:A stable complex between pentaammineruthenium(III) and histidine-33 in horse heart ferricytochrome c is formed in the reaction between aquopentaammineruthenium(II) and the protein at pH 7. HPLC of the tryptic hydrolysate of the modified protein was employed to identify the pentaammineruthenium binding site. Spectrosco...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Yocom KM,Shelton JB,Shelton JR,Schroeder WA,Worosila G,Isied SS,Bordignon E,Gray HB

更新日期：1982-11-01 00:00:00

abstract：:Most poxviruses, including variola, the causative agent of smallpox, express a secreted protein of 35 kDa, vCCI, which binds CC-chemokines with high affinity. This viral protein competes with the host cellular CC-chemokine receptors (CCRs), reducing inflammation and interfering with the host immune response. Such prot...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Carfí A,Smith CA,Smolak PJ,McGrew J,Wiley DC

更新日期：1999-10-26 00:00:00

abstract：:The full primary structure of the very potent opioid peptide dynorphin, from porcine pituitary, has been determined. It is (H)Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys-Trp-Asp-Asn-Gln(OH). The synthetic peptide with this sequence behaves identically to natural dynorphin in a number of ways, and it has the sa...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Goldstein A,Fischli W,Lowney LI,Hunkapiller M,Hood L

更新日期：1981-11-01 00:00:00

abstract：:We have examined the role of cyclooxygenase 2 (COX-2) in a model of inflammation in vivo. Carrageenan administration to the subcutaneous rat air pouch induces a rapid inflammatory response characterized by high levels of prostaglandins (PGs) and leukotrienes in the fluid exudate. The time course of the induction of CO...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Masferrer JL,Zweifel BS,Manning PT,Hauser SD,Leahy KM,Smith WG,Isakson PC,Seibert K

更新日期：1994-04-12 00:00:00

abstract：:We have used the 1.1 kilobases of the 5' upstream region of the platelet factor four (PF4) gene coupled to the prokaryotic beta-galactosidase gene to generate two lines of transgenic mice that express this construct. Studies of blood, bone marrow, spleen, and thymus reveal that platelets are the only circulating blood...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Ravid K,Beeler DL,Rabin MS,Ruley HE,Rosenberg RD

更新日期：1991-02-15 00:00:00

abstract：:The kidney has an extraordinary ability to maintain stable fractional solute and fluid reabsorption over a wide range of glomerular filtration rates (GFRs). Internalization of filtered low molecular weight proteins, vitamins, hormones, and other small molecules is mediated by the proximal tubule (PT) multiligand recep...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Raghavan V,Rbaibi Y,Pastor-Soler NM,Carattino MD,Weisz OA

更新日期：2014-06-10 00:00:00

abstract：:Near infrared diffuse optical spectroscopy and diffuse optical imaging are promising methods that eventually may enhance or replace existing technologies for breast cancer screening and diagnosis. These techniques are based on highly sensitive, quantitative measurements of optical and functional contrast between healt...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Shah N,Cerussi A,Eker C,Espinoza J,Butler J,Fishkin J,Hornung R,Tromberg B

更新日期：2001-04-10 00:00:00

abstract：:Enhanced ethylene production is an early response of plants to pathogen attack and has been associated with both resistance and susceptibility to disease. Tobacco plants were transformed with the mutant etr1-1 gene from Arabidopsis, conferring dominant ethylene insensitivity. Besides lacking known ethylene responses, ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Knoester M,van Loon LC,van den Heuvel J,Hennig J,Bol JF,Linthorst HJ

更新日期：1998-02-17 00:00:00

abstract：:The fungus, Phycomyces blakesleeanus, shows many well-defined responses to a number of external stimuli. Genetic analysis shows that at least eight genes are involved in Phycomyces sensory transduction. As a first step toward the molecular analysis of these genes and their products, we have developed a transformation ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Revuelta JL,Jayaram M

更新日期：1986-10-01 00:00:00

abstract：:A muscarone-binding material has been found in Torpedo electroplax. The material behaves in several ways as one would expect of the binding component of the acetylcholine receptor, especially in its high affinity for muscarone (approximate K = 7 x 10(-6)M), acetylcholine (approximate K = 1.1 x 10(-6)M), curare, and ni...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： O'Brien RD,Gilmour LP

更新日期：1969-06-01 00:00:00

abstract：:Nonribosomal peptide synthetases (NRPSs) usually catalyze the biosynthesis of peptide natural products by sequential selection, activation, and condensation of amino acid precursors. It was reported that some fatty acids, α-ketoacids, and α-hydroxyacids originating from amino acid metabolism as well as polyketide-deri...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Peng C,Pu JY,Song LQ,Jian XH,Tang MC,Tang GL

更新日期：2012-05-29 00:00:00

abstract：:A high molecular weight protein (HMWP) with properties similar to those of both actin-binding protein (ABP) and filamin has been isolated from cultured baby hamster kidney (BHK-21) cells. The protein was present in an actomyosin-depleted sucrose extract of the cells and was eluted, upon gel chromatography on Sepharose...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Schloss JA,Goldman RD

更新日期：1979-09-01 00:00:00

abstract：:Horizontal drilling and hydraulic fracturing have enhanced energy production but raised concerns about drinking-water contamination and other environmental impacts. Identifying the sources and mechanisms of contamination can help improve the environmental and economic sustainability of shale-gas extraction. We analyze...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Darrah TH,Vengosh A,Jackson RB,Warner NR,Poreda RJ

更新日期：2014-09-30 00:00:00