Selective amplification by auto- and cross-catalysis in a replicating peptide system.

abstract：:The current picture of galaxy evolution advocates co-evolution of galaxies and their nuclear massive black holes, through accretion and galactic merging. Pairs of quasars, each with a massive black hole at the centre of its galaxy, have separations of 6,000 to 300,000 light years (refs 2 and 3; 1 parsec = 3.26 light y...

journal_title：Nature

authors： Fabbiano G,Wang J,Elvis M,Risaliti G

更新日期：2011-08-31 00:00:00

abstract：:The cloning and characterization of 'clock gene' families has advanced our understanding of the molecular control of the mammalian circadian clock. We have analysed the human genome for additional relatives, and identified new candidate genes that may expand our knowledge of the molecular workings of the circadian clo...

journal_title：Nature

authors： Clayton JD,Kyriacou CP,Reppert SM

更新日期：2001-02-15 00:00:00

abstract：:Angiotensin II is an important effector molecule controlling blood pressure and volume in the cardiovascular system. Its importance is manifested by the efficacy of angiotensin-converting enzyme inhibitors in the treatment of hypertension and congestive heart failure. Angiotensin II interacts with two pharmacologicall...

journal_title：Nature

authors： Murphy TJ,Alexander RW,Griendling KK,Runge MS,Bernstein KE

更新日期：1991-05-16 00:00:00

abstract：:Little is known about the organic component of Lower and Middle Palaeolithic technologies, particular with respect to wooden tools. Here I describe some wooden throwing spears about 400,000 years old that were discovered in 1995 at the Pleistocene site at Schöningen, Germany. They are thought to be the oldest complete...

journal_title：Nature

authors： Thieme H

更新日期：1997-02-27 00:00:00

abstract：:The aspergilli comprise a diverse group of filamentous fungi spanning over 200 million years of evolution. Here we report the genome sequence of the model organism Aspergillus nidulans, and a comparative study with Aspergillus fumigatus, a serious human pathogen, and Aspergillus oryzae, used in the production of sake,...

journal_title：Nature

authors： Galagan JE,Calvo SE,Cuomo C,Ma LJ,Wortman JR,Batzoglou S,Lee SI,Baştürkmen M,Spevak CC,Clutterbuck J,Kapitonov V,Jurka J,Scazzocchio C,Farman M,Butler J,Purcell S,Harris S,Braus GH,Draht O,Busch S,D'Enfert C,Bou

更新日期：2005-12-22 00:00:00

abstract：:oop RNA, which is initiated at the po promoter and is 81 nucleotides long, can function as a leader sequence for the lambda immunity establishment transcription, previously believed to originate at a special promoter pre located in the y region. Thus, oop RNA seems to have a dual role, either favouring the lytic cycle...

journal_title：Nature

authors： Honigman A,Hu SL,Chase R,Szybalski W

更新日期：1976-07-08 00:00:00

abstract：:Why infer evolution when you can watch it happen in real time? This is the basic premise of using populations of fast-replicating microorganisms in test tubes to study evolution. The approach, known as experimental evolution, has provided a way of testing many of the key hypotheses that arose from the modern evolution...

journal_title：Nature

authors： Buckling A,Craig Maclean R,Brockhurst MA,Colegrave N

更新日期：2009-02-12 00:00:00

abstract：:The recognition of foreign antigens by T lymphocytes is essential to most adaptive immune responses. It is driven by specific T-cell antigen receptors (TCRs) binding to antigenic peptide-major histocompatibility complex (pMHC) molecules on other cells. If productive, these interactions promote the formation of an immu...

journal_title：Nature

authors： Huppa JB,Axmann M,Mörtelmaier MA,Lillemeier BF,Newell EW,Brameshuber M,Klein LO,Schütz GJ,Davis MM

更新日期：2010-02-18 00:00:00

abstract：:The Colorado plateau is a large, tectonically intact, physiographic province in the southwestern North American Cordillera that stands at ∼1,800-2,000 m elevation and has long been thought to be in isostatic equilibrium. The origin of these high elevations is unclear because unlike the surrounding provinces, which hav...

journal_title：Nature

authors： Levander A,Schmandt B,Miller MS,Liu K,Karlstrom KE,Crow RS,Lee CT,Humphreys ED

更新日期：2011-04-28 00:00:00

abstract：:At early stages of the mammalian visual cortex, neurons with similar stimulus selectivities are vertically arrayed through the thickness of the cortical sheet and clustered in patches or bands across the surface. This organization, referred to as a 'column', has been found with respect to one-dimensional stimulus para...

journal_title：Nature

authors： Fujita I,Tanaka K,Ito M,Cheng K

更新日期：1992-11-26 00:00:00

abstract：:The crown-of-thorns starfish (COTS, the Acanthaster planci species group) is a highly fecund predator of reef-building corals throughout the Indo-Pacific region. COTS population outbreaks cause substantial loss of coral cover, diminishing the integrity and resilience of reef ecosystems. Here we sequenced genomes of CO...

journal_title：Nature

authors： Hall MR,Kocot KM,Baughman KW,Fernandez-Valverde SL,Gauthier MEA,Hatleberg WL,Krishnan A,McDougall C,Motti CA,Shoguchi E,Wang T,Xiang X,Zhao M,Bose U,Shinzato C,Hisata K,Fujie M,Kanda M,Cummins SF,Satoh N,Degnan SM

更新日期：2017-04-05 00:00:00

abstract：:The alpha-helix defined in 1951 by Pauling et al. on the basis of model building and X-ray fibre diffraction data has 3.65 residues per turn (n) achieved with planar peptides, torsion angles of phi = -48 degrees and psi = -57 degrees and hydrogen bonds which are close to linear. Although X-ray analyses of proteins hav...

journal_title：Nature

authors： Blundell T,Barlow D,Borkakoti N,Thornton J

更新日期：1983-11-17 00:00:00

abstract：:The Late Devonian genus Ichthyostega was for many decades the earliest known tetrapod, and the sole representative of a transitional form between a fish and a land vertebrate. However, despite being known since 1932 (ref. 1) from a large collection of specimens, its morphology remained enigmatic and not what was expec...

journal_title：Nature

authors： Clack JA,Ahlberg PE,Finney SM,Dominguez Alonso P,Robinson J,Ketcham RA

更新日期：2003-09-04 00:00:00

abstract：:Cysticercosis caused by larval tapeworms is a major public health problem and a cause of substantial economic losses in the farm-animal industries. Taenia ovis in sheep is a particularly important example. Immunity to reinfection with the larvae has a central role in regulating natural transmission of the parasites, a...

journal_title：Nature

authors： Johnson KS,Harrison GB,Lightowlers MW,O'Hoy KL,Cougle WG,Dempster RP,Lawrence SB,Vinton JG,Heath DD,Rickard MD

更新日期：1989-04-13 00:00:00

abstract：:Neutrophils activated by the formyl peptide f-Met-Leu-Phe transiently accumulate a small subset of highly polar inositol lipids. A similar family of lipids also appear in many other cells in response to a range of growth factors and activated oncogenes, and are presumed to be the direct or indirect products of 3-phosp...

journal_title：Nature

authors： Stephens LR,Hughes KT,Irvine RF

更新日期：1991-05-02 00:00:00

abstract：:Unmethylated CpG dinucleotides are more frequent in the genomes of bacteria and viruses than of vertebrates. We report here that bacterial DNA and synthetic oligodeoxynucleotides containing unmethylated CpG dinucleotides induce murine B cells to proliferate and secrete immunoglobulin in vitro and in vivo. This activat...

journal_title：Nature

authors： Krieg AM,Yi AK,Matson S,Waldschmidt TJ,Bishop GA,Teasdale R,Koretzky GA,Klinman DM

更新日期：1995-04-06 00:00:00

abstract：:Transcriptional repression by nuclear receptors has been correlated to binding of the putative co-repressor, N-CoR. A complex has been identified that contains N-CoR, the Mad presumptive co-repressor mSin3, and the histone deacetylase mRPD3, and which is required for both nuclear receptor- and Mad-dependent repression...

journal_title：Nature

authors： Heinzel T,Lavinsky RM,Mullen TM,Söderstrom M,Laherty CD,Torchia J,Yang WM,Brard G,Ngo SD,Davie JR,Seto E,Eisenman RN,Rose DW,Glass CK,Rosenfeld MG

更新日期：1997-05-01 00:00:00

abstract：:Clathrin is the structural protein of coated membranes involved in receptor-mediated endocytosis and aspects of Golgi sorting in eukaryotic cells. We have now detected a stoichiometric complex of clathrin with a novel protein of M(r) approximately 100,000 (100K) in lysates of different mammalian cells. Formation of th...

journal_title：Nature

authors： Pleasure IT,Black MM,Keen JH

更新日期：1993-09-30 00:00:00

abstract：:Rates of atmospheric deposition of biologically active nitrogen (N) are two to seven times the pre-industrial rates in many developed nations because of combustion of fossil fuels and agricultural fertilization. They are expected to increase similarly over the next 50 years in industrializing nations of Asia and South...

journal_title：Nature

authors： Clark CM,Tilman D

更新日期：2008-02-07 00:00:00

abstract：:Microbes comprise the majority of extant organisms, yet much remains to be learned about the nature and driving forces of microbial diversification. Our understanding of how microorganisms adapt and evolve can be advanced by genome-wide documentation of the patterns of genetic exchange, particularly if analyses target...

journal_title：Nature

authors： Lo I,Denef VJ,Verberkmoes NC,Shah MB,Goltsman D,DiBartolo G,Tyson GW,Allen EE,Ram RJ,Detter JC,Richardson P,Thelen MP,Hettich RL,Banfield JF

更新日期：2007-03-29 00:00:00

abstract：:Susceptibility to some human diseases is linked, albeit weakly, to major transplantation antigens (HLA) encoded by the major histocompatibility gene complex (MHC). Here we have studied MHC/disease association in inbred strains of mice after intracerebral (i.c.) injection of lymphocytic choriomeningitis virus (LCMV). T...

journal_title：Nature

authors： Zinkernagel RM,Pfau CJ,Hengartner H,Althage A

更新日期：1985-08-29 00:00:00

abstract：:Uridine at the first anticodon position (U34) of glutamate, lysine and glutamine transfer RNAs is universally modified by thiouridylase into 2-thiouridine (s2U34), which is crucial for precise translation by restricting codon-anticodon wobble during protein synthesis on the ribosome. However, it remains unclear how th...

journal_title：Nature

authors： Numata T,Ikeuchi Y,Fukai S,Suzuki T,Nureki O

更新日期：2006-07-27 00:00:00

abstract：:Crustal faults have long been identified as sites where localized sliding motion occurs during earthquakes, which allows for the relative motion between adjacent crustal blocks. Although there is a growing awareness that we must understand the evolution of fault systems on many timescales to relate present-day crustal...

journal_title：Nature

authors： Vidale JE,Li YG

更新日期：2003-01-30 00:00:00

abstract：:Phosphorylation of membrane components is thought to be an important process in membrane function. Phosphorylated proteins and a special class of phospholipids, the (poly)phosphoinositides (poly PI), are implicated in the regulation of membrane permeability and synaptic transmission in neurones. For many years, protei...

journal_title：Nature

authors： Jolles J,Zwiers H,van Dongen CJ,Schotman P,Wirtz KW,Gispen WH

更新日期：1980-08-07 00:00:00

abstract：:Zygotic genome activation (ZGA) is the first transcription event in life1. However, it is unclear how RNA polymerase is engaged in initiating ZGA in mammals. Here, by developing small-scale Tn5-assisted chromatin cleavage with sequencing (Stacc-seq), we investigated the landscapes of RNA polymerase II (Pol II) binding...

journal_title：Nature

authors： Liu B,Xu Q,Wang Q,Feng S,Lai F,Wang P,Zheng F,Xiang Y,Wu J,Nie J,Qiu C,Xia W,Li L,Yu G,Lin Z,Xu K,Xiong Z,Kong F,Liu L,Huang C,Yu Y,Na J,Xie W

更新日期：2020-11-01 00:00:00

abstract：:RecBCD is a multi-functional enzyme complex that processes DNA ends resulting from a double-strand break. RecBCD is a bipolar helicase that splits the duplex into its component strands and digests them until encountering a recombinational hotspot (Chi site). The nuclease activity is then attenuated and RecBCD loads Re...

journal_title：Nature

authors： Singleton MR,Dillingham MS,Gaudier M,Kowalczykowski SC,Wigley DB

更新日期：2004-11-11 00:00:00

abstract：:Quantum information science involves the storage, manipulation and communication of information encoded in quantum systems, where the phenomena of superposition and entanglement can provide enhancements over what is possible classically. Large-scale quantum information processors require stable and addressable quantum...

journal_title：Nature

authors： Moehring DL,Maunz P,Olmschenk S,Younge KC,Matsukevich DN,Duan LM,Monroe C

更新日期：2007-09-06 00:00:00

abstract：:A recombinant adenovirus serotype 5 (rAd5) vector-based vaccine for HIV-1 has recently failed in a phase 2b efficacy study in humans. Consistent with these results, preclinical studies have demonstrated that rAd5 vectors expressing simian immunodeficiency virus (SIV) Gag failed to reduce peak or setpoint viral loads a...

journal_title：Nature

authors： Liu J,O'Brien KL,Lynch DM,Simmons NL,La Porte A,Riggs AM,Abbink P,Coffey RT,Grandpre LE,Seaman MS,Landucci G,Forthal DN,Montefiori DC,Carville A,Mansfield KG,Havenga MJ,Pau MG,Goudsmit J,Barouch DH

更新日期：2009-01-01 00:00:00

abstract：:Most Oryza sativa cultivars die within a week of complete submergence--a major constraint to rice production in south and southeast Asia that causes annual losses of over US 1 billion dollars and affects disproportionately the poorest farmers in the world. A few cultivars, such as the O. sativa ssp. indica cultivar FR...

journal_title：Nature

authors： Xu K,Xu X,Fukao T,Canlas P,Maghirang-Rodriguez R,Heuer S,Ismail AM,Bailey-Serres J,Ronald PC,Mackill DJ

更新日期：2006-08-10 00:00:00

abstract：:Carbonates on large Solar System bodies like Earth and Mars (the latter represented by the meteorite ALH84001) form through the weathering of silicates in a watery (CO3)2- solution. The presence of carbonates in interplanetary dust particles and asteroids (again, represented by meteorites) is not completely understood...

journal_title：Nature

authors： Kemper F,Jäger C,Waters LB,Henning T,Molster FJ,Barlow MJ,Lim T,de Koter A

更新日期：2002-01-17 00:00:00