In vivo cell sorting in complementary segmental domains mediated by Eph receptors and ephrins.

abstract：:Experimental and simulation studies show that small monomeric proteins fold in one kinetic step, which entails overcoming the free-energy barrier between the unfolded and the native protein through a transition state. Two models of transition state formation have been proposed: a 'nonspecific' one in which it depends ...

journal_title：Nature

authors： Shakhnovich E,Abkevich V,Ptitsyn O

更新日期：1996-01-04 00:00:00

abstract：:The known endothelial mitogens stimulate growth of vascular endothelial cells without regard to their tissue of origin. Here we report a growth factor that is expressed largely in one type of tissue and acts selectively on one type of endothelium. This molecule, called endocrine-gland-derived vascular endothelial grow...

journal_title：Nature

authors： LeCouter J,Kowalski J,Foster J,Hass P,Zhang Z,Dillard-Telm L,Frantz G,Rangell L,DeGuzman L,Keller GA,Peale F,Gurney A,Hillan KJ,Ferrara N

更新日期：2001-08-30 00:00:00

abstract：:The behaviour of electrons in solids is well described by Landau's Fermi-liquid theory, which predicts that although electrons in a metal interact, they can still be treated as well defined fermions, which are called 'quasiparticles'. At low temperatures, the ability of quasiparticles to transport heat is given strict...

journal_title：Nature

authors： Hill RW,Proust C,Taillefer L,Fournier P,Greene RL

更新日期：2001-12-13 00:00:00

abstract：: ...

journal_title：Nature

authors：

更新日期：2018-10-01 00:00:00

abstract：:Inhibitory neurotransmission mediated by GABA(A) receptors can be modulated by the endogenous neurosteroids, allopregnanolone and tetrahydro-deoxycorticosterone. Neurosteroids are synthesized de novo in the brain during stress, pregnancyand after ethanol consumption, and disrupted steroid regulation of GABAergic trans...

journal_title：Nature

authors： Hosie AM,Wilkins ME,da Silva HM,Smart TG

更新日期：2006-11-23 00:00:00

abstract：:Recent studies in which cloned immunoglobulin genes were introduced into cultured cells have produced two significant findings. First, the genes are expressed after transfection into lymphoid cells but not non-lymphoid cells. Second, transcription of an immunoglobulin gene requires, in addition to the promoter region,...

journal_title：Nature

authors： Foster J,Stafford J,Queen C

更新日期：1985-05-30 00:00:00

abstract：:Distance determination in animals can be achieved by visual or non-visual cues. Weakly electric fish use active electrolocation for orientation in the dark. By perceiving self-produced electric signals with epidermal electroreceptors, fish can detect, locate and analyse nearby objects. Distance discrimination, however...

journal_title：Nature

authors： von der Emde G,Schwarz S,Gomez L,Budelli R,Grant K

更新日期：1998-10-29 00:00:00

abstract：:Contamination of ground waters with water-soluble aromatic hydrocarbons, common components of petroleum pollution, often produces anoxic conditions under which microbial degradation of the aromatics is slow. Oxygen is often added to contaminated ground water to stimulate biodegradation, but this can be technically dif...

journal_title：Nature

authors： Lovley DR,Woodward JC,Chapelle FH

更新日期：1994-07-14 00:00:00

abstract：:The basolateral amygdala (BLA) has a crucial role in emotional learning irrespective of valence. The BLA projection to the nucleus accumbens (NAc) is thought to modulate cue-triggered motivated behaviours, but our understanding of the interaction between these two brain regions has been limited by the inability to man...

journal_title：Nature

authors： Stuber GD,Sparta DR,Stamatakis AM,van Leeuwen WA,Hardjoprajitno JE,Cho S,Tye KM,Kempadoo KA,Zhang F,Deisseroth K,Bonci A

更新日期：2011-06-29 00:00:00

abstract：:During female germline development, oocytes become a highly specialized cell type and form a maternal cytoplasmic store of crucial factors. Oocyte growth is triggered at the transition from primordial to primary follicle and is accompanied by dynamic changes in gene expression1, but the gene regulatory network that co...

journal_title：Nature

authors： Hamazaki N,Kyogoku H,Araki H,Miura F,Horikawa C,Hamada N,Shimamoto S,Hikabe O,Nakashima K,Kitajima TS,Ito T,Leitch HG,Hayashi K

更新日期：2021-01-01 00:00:00

abstract：:The fusion pore is the first crucial intermediate formed during exocytosis, yet little is known about the mechanisms that determine the size and kinetic properties of these transient structures. Here, we reduced the number of available SNAREs (proteins that mediate vesicle fusion) in neurons and observed changes in tr...

journal_title：Nature

authors： Bao H,Das D,Courtney NA,Jiang Y,Briguglio JS,Lou X,Roston D,Cui Q,Chanda B,Chapman ER

更新日期：2018-02-08 00:00:00

abstract：:The gal operon of Escherichia coli is controlled by two independent promotors--one is activated and the other inhibited by cyclic AMP and cyclic AMP receptor protein. The two promotors are modulated, however, by the same operator locus and receptor protein. ...

journal_title：Nature

authors： Adhya S,Miller W

更新日期：1979-06-07 00:00:00

abstract：:Ligand-gated ion channels are multi-subunit complexes where each subunit-type is encoded by several related genes. Heterologous expression of any one of the neuronal nicotinic acetylcholine receptors (nAChR) alpha-type subunits, either alone or with any beta-type subunit, typically yields functional nAChR channels. A ...

journal_title：Nature

authors： Ramirez-Latorre J,Yu CR,Qu X,Perin F,Karlin A,Role L

更新日期：1996-03-28 00:00:00

abstract：:Alzheimer's disease (AD) is characterized by deposition of amyloid-β (Aβ) plaques and neurofibrillary tangles in the brain, accompanied by synaptic dysfunction and neurodegeneration. Antibody-based immunotherapy against Aβ to trigger its clearance or mitigate its neurotoxicity has so far been unsuccessful. Here we rep...

journal_title：Nature

authors： Sevigny J,Chiao P,Bussière T,Weinreb PH,Williams L,Maier M,Dunstan R,Salloway S,Chen T,Ling Y,O'Gorman J,Qian F,Arastu M,Li M,Chollate S,Brennan MS,Quintero-Monzon O,Scannevin RH,Arnold HM,Engber T,Rhodes K,Ferr

更新日期：2016-09-01 00:00:00

abstract：:The biosynthesis of several protein cofactors is subject to feedback regulation by riboswitches. Flavin mononucleotide (FMN)-specific riboswitches, also known as RFN elements, direct expression of bacterial genes involved in the biosynthesis and transport of riboflavin (vitamin B(2)) and related compounds. Here we pre...

journal_title：Nature

authors： Serganov A,Huang L,Patel DJ

更新日期：2009-03-12 00:00:00

abstract：:A 12 amino-acid synthetic peptide (NANP)3 comprising the immunodominant epitope of Plasmodium falciparum circumsporozoite protein was conjugated to tetanus toxoid (TT), adjuvanted with aluminium hydroxide, and administered intramuscularly in three doses at monthly intervals to 35 healthy males as a malaria vaccine. No...

journal_title：Nature

authors： Herrington DA,Clyde DF,Losonsky G,Cortesia M,Murphy JR,Davis J,Baqar S,Felix AM,Heimer EP,Gillessen D

更新日期：1987-07-16 00:00:00

abstract：:Patchwork homology observed between divergent members of polymorphic multigene families is thought to reflect evolution by short-tract gene conversion (nonreciprocal recombination), although this mechanism cannot usually be confirmed in higher organisms. In contrast to meiotic conversions observed in laboratory yeast ...

journal_title：Nature

authors： Wheeler CJ,Maloney D,Fogel S,Goodenow RS

更新日期：1990-09-13 00:00:00

abstract：:The recent discovery of CD4(+) T cells characterized by secretion of interleukin (IL)-17 (T(H)17 cells) and the naturally occurring regulatory FOXP3(+) CD4 T cell (nT(reg)) has had a major impact on our understanding of immune processes not readily explained by the T(H)1/T(H)2 paradigm. T(H)17 and nT(reg) cells have b...

journal_title：Nature

authors： Yang L,Anderson DE,Baecher-Allan C,Hastings WD,Bettelli E,Oukka M,Kuchroo VK,Hafler DA

更新日期：2008-07-17 00:00:00

abstract：:Overexploitation of renewable resources today has a high cost on the welfare of future generations. Unlike in other public goods games, however, future generations cannot reciprocate actions made today. What mechanisms can maintain cooperation with the future? To answer this question, we devise a new experimental para...

journal_title：Nature

authors： Hauser OP,Rand DG,Peysakhovich A,Nowak MA

更新日期：2014-07-10 00:00:00

abstract：:The violation of a Bell inequality is an experimental observation that forces the abandonment of a local realistic viewpoint--namely, one in which physical properties are (probabilistically) defined before and independently of measurement, and in which no physical influence can propagate faster than the speed of light...

journal_title：Nature

authors： Giustina M,Mech A,Ramelow S,Wittmann B,Kofler J,Beyer J,Lita A,Calkins B,Gerrits T,Nam SW,Ursin R,Zeilinger A

更新日期：2013-05-09 00:00:00

abstract：:Reactive oxygen species trigger cellular responses by activation of stress-responsive mitogen-activated protein kinase (MAPK) signalling pathways. Reversal of MAPK activation requires the transcriptional induction of specialized cysteine-based phosphatases that mediate MAPK dephosphorylation. Paradoxically, oxidative ...

journal_title：Nature

authors： Fox GC,Shafiq M,Briggs DC,Knowles PP,Collister M,Didmon MJ,Makrantoni V,Dickinson RJ,Hanrahan S,Totty N,Stark MJ,Keyse SM,McDonald NQ

更新日期：2007-05-24 00:00:00

abstract：:To explain the lower atmospheric CO2 concentrations during glacial periods, it has been suggested that the productivity of marine phytoplankton was stimulated by an increased flux of iron-bearing dust to the oceans. One component of this theory is that iron-an essential element/nutrient for nitrogen-fixing organisms-w...

journal_title：Nature

authors： Ganeshram RS,Pedersen TF,Calvert S,François R

更新日期：2002-01-10 00:00:00

abstract：:Modern agriculture has accelerated biological methane and nitrogen cycling on a global scale. Freshwater sediments often receive increased downward fluxes of nitrate from agricultural runoff and upward fluxes of methane generated by anaerobic decomposition. In theory, prokaryotes should be capable of using nitrate to ...

journal_title：Nature

authors： Raghoebarsing AA,Pol A,van de Pas-Schoonen KT,Smolders AJ,Ettwig KF,Rijpstra WI,Schouten S,Damsté JS,Op den Camp HJ,Jetten MS,Strous M

更新日期：2006-04-13 00:00:00

abstract：:Immune recognition of protein antigens relies on the combined interaction of multiple antibody loops, which provide a fairly large footprint and constrain the size and shape of protein surfaces that can be targeted. Single protein loops can mediate extremely high-affinity binding, but it is unclear whether such a mech...

journal_title：Nature

authors： Ekiert DC,Kashyap AK,Steel J,Rubrum A,Bhabha G,Khayat R,Lee JH,Dillon MA,O'Neil RE,Faynboym AM,Horowitz M,Horowitz L,Ward AB,Palese P,Webby R,Lerner RA,Bhatt RR,Wilson IA

更新日期：2012-09-27 00:00:00

abstract：:An optimal search theory, the so-called Lévy-flight foraging hypothesis, predicts that predators should adopt search strategies known as Lévy flights where prey is sparse and distributed unpredictably, but that Brownian movement is sufficiently efficient for locating abundant prey. Empirical studies have generated con...

journal_title：Nature

authors： Humphries NE,Queiroz N,Dyer JR,Pade NG,Musyl MK,Schaefer KM,Fuller DW,Brunnschweiler JM,Doyle TK,Houghton JD,Hays GC,Jones CS,Noble LR,Wearmouth VJ,Southall EJ,Sims DW

更新日期：2010-06-24 00:00:00

abstract：:The diverse functions of RNA, which include enzymatic activities, regulatory roles in transcription and translation, are made possible by tertiary structure. Computer algorithms can predict the secondary structure of an RNA molecule using free-energy parameters for base pairing and stacking, loops and bulges. However,...

journal_title：Nature

authors： Puglisi JD,Wyatt JR,Tinoco I Jr

更新日期：1988-01-21 00:00:00

abstract：:Eukaryotic transfer RNA genes have two internal discontinuous control regions, the A and B blocks, which correspond approximately to the D-stem and the pseudo-U arm of tRNA. In reconstituted transcription systems at least two components are required to direct accurate initiation by RNA polymerase (refs 4,5). However, ...

journal_title：Nature

authors： Smagowicz W,Ruet A,Camier S,Sentenac A,Fromageot P,Sternbach H

更新日期：1983-08-25 00:00:00

abstract：:We have designed a bacterial system that is switched between different states by red light. The system consists of a synthetic sensor kinase that allows a lawn of bacteria to function as a biological film, such that the projection of a pattern of light on to the bacteria produces a high-definition (about 100 megapixel...

journal_title：Nature

authors： Levskaya A,Chevalier AA,Tabor JJ,Simpson ZB,Lavery LA,Levy M,Davidson EA,Scouras A,Ellington AD,Marcotte EM,Voigt CA

更新日期：2005-11-24 00:00:00

abstract：:During the last glacial period, the Laurentide Ice Sheet sporadically discharged huge numbers of icebergs through the Hudson Strait into the North Atlantic Ocean, leaving behind distinct layers of ice-rafted debris in the ocean sediments. Perplexingly, these massive discharge events-Heinrich events-occurred during the...

journal_title：Nature

authors： Bassis JN,Petersen SV,Mac Cathles L

更新日期：2017-02-15 00:00:00

abstract：:For parallel computers to simulate our brains, we must face the fact that human beings have a better claim on the title Homo seriatim than Homo sapiens--we're more consistently serial than wise. ...

journal_title：Nature

authors： Calvin WH

更新日期：1987-11-05 00:00:00