Global environmental consequences of twenty-first-century ice-sheet melt.

abstract：:Excision of introns from nuclear precursors to messenger RNAs (pre-mRNAs) by the spliceosome requires two distinct phosphodiester transfer (transesterification) reactions: exchange of a 3'-5' for a 2'-5' bond in the first step (lariat formation) and exchange of one 3'-5' phosphodiester for another in the second step (...

journal_title：Nature

authors： Moore MJ,Sharp PA

更新日期：1993-09-23 00:00:00

abstract：:Understanding cellular response to environmental stress has broad implications for human disease. AMP-activated protein kinase (AMPK) orchestrates the regulation of energy-generating and -consuming pathways, and protects the heart against ischaemic injury and apoptosis. A role for circulating hormones such as adiponec...

journal_title：Nature

authors： Miller EJ,Li J,Leng L,McDonald C,Atsumi T,Bucala R,Young LH

更新日期：2008-01-31 00:00:00

abstract：:In lung diseases such as asthma, expiratory flow becomes limited, airways can collapse and the vital exchange of gases is compromised. Here we model the inflation of collapsed regions of the lung during inspiration in terms of avalanches propagating through a bifurcating network of airways, and find that the accompany...

journal_title：Nature

authors： Alencar AM,Arold SP,Buldyrev SV,Majumdar A,Stamenović D,Stanley HE,Suki B

更新日期：2002-06-20 00:00:00

abstract：:The hypothesis that certain RNA molecules may be able to catalyse RNA replication is central to current theories of the early evolution of life. In support of this idea, we describe here an RNA that synthesizes RNA using the same reaction as that employed by protein enzymes that catalyse RNA polymerization. In the pre...

journal_title：Nature

authors： Ekland EH,Bartel DP

更新日期：1996-07-25 00:00:00

abstract：:The primary action of a family of mitogens including bombesin, bradykinin, vasopressin and alpha-thrombin is to activate the hydrolysis of polyphosphoinositides. Hydrolysis of phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) by phospholipase C is mediated through coupling of surface receptors to a GTP-binding pro...

journal_title：Nature

authors： Chambard JC,Paris S,L'Allemain G,Pouysségur J

更新日期：1987-04-23 00:00:00

abstract：:'Long' gamma-ray bursts (GRBs) are commonly accepted to originate in the explosion of particularly massive stars, which give rise to highly relativistic jets. Inhomogeneities in the expanding flow result in internal shock waves that are believed to produce the gamma-rays we see. As the jet travels further outward into...

journal_title：Nature

authors： Tagliaferri G,Goad M,Chincarini G,Moretti A,Campana S,Burrows DN,Perri M,Barthelmy SD,Gehrels N,Krimm H,Sakamoto T,Kumar P,Mészáros PI,Kobayashi S,Zhang B,Angelini L,Banat P,Beardmore AP,Capalbi M,Covino S,Cusuman

更新日期：2005-08-18 00:00:00

abstract：:Water availability limits plant growth and production in almost all terrestrial ecosystems. However, biomes differ substantially in sensitivity of aboveground net primary production (ANPP) to between-year variation in precipitation. Average rain-use efficiency (RUE; ANPP/precipitation) also varies between biomes, supp...

journal_title：Nature

authors： Huxman TE,Smith MD,Fay PA,Knapp AK,Shaw MR,Loik ME,Smith SD,Tissue DT,Zak JC,Weltzin JF,Pockman WT,Sala OE,Haddad BM,Harte J,Koch GW,Schwinning S,Small EE,Williams DG

更新日期：2004-06-10 00:00:00

abstract：:Large-conductance Ca(2+)-gated K(+) (BK) channels are essential for many biological processes such as smooth muscle contraction and neurotransmitter release. This group of channels can be activated synergistically by both voltage and intracellular Ca(2+), with the large carboxy-terminal intracellular portion being res...

journal_title：Nature

authors： Wu Y,Yang Y,Ye S,Jiang Y

更新日期：2010-07-15 00:00:00

abstract：:In vertebrates, unfertilized eggs (or mature oocytes) are arrested at metaphase of meiosis II by a cytoplasmic activity called cytostatic factor (CSF). The classical Mos-MAPK pathway has long been implicated in CSF arrest of vertebrate eggs, but exactly how it exerts CSF activity remains unclear. Recently, Erp1 (also ...

journal_title：Nature

authors： Inoue D,Ohe M,Kanemori Y,Nobui T,Sagata N

更新日期：2007-04-26 00:00:00

abstract：:Visible-light absorption and transport of the resultant electronic excitations to a reaction centre through Förster resonance energy transfer1-3 (FRET) are critical to the operation of biological light-harvesting systems4, and are used in various artificial systems made of synthetic dyes5, polymers6 or nanodots7,8. Th...

journal_title：Nature

authors： Lau JA,Chen L,Choudhury A,Schwarzer D,Verma VB,Wodtke AM

更新日期：2021-01-01 00:00:00

abstract：:Laboratory measurements of sound velocities of high-pressure minerals provide crucial information on the composition and constitution of the deep mantle via comparisons with observed seismic velocities. Calcium silicate (CaSiO3) perovskite (CaPv) is a high-pressure phase that occurs at depths greater than about 560 ki...

journal_title：Nature

authors： Gréaux S,Irifune T,Higo Y,Tange Y,Arimoto T,Liu Z,Yamada A

更新日期：2019-01-01 00:00:00

abstract：:Fireflies communicate with each other by emitting yellow-green to yellow-orange brilliant light. The bioluminescence reaction, which uses luciferin, Mg-ATP and molecular oxygen to yield an electronically excited oxyluciferin species, is carried out by the enzyme luciferase. Visible light is emitted during relaxation o...

journal_title：Nature

authors： Nakatsu T,Ichiyama S,Hiratake J,Saldanha A,Kobashi N,Sakata K,Kato H

更新日期：2006-03-16 00:00:00

abstract：:The Gulf Stream transports large amounts of heat from the tropics to middle and high latitudes, and thereby affects weather phenomena such as cyclogenesis and low cloud formation. But its climatic influence, on monthly and longer timescales, remains poorly understood. In particular, it is unclear how the warm current ...

journal_title：Nature

authors： Minobe S,Kuwano-Yoshida A,Komori N,Xie SP,Small RJ

更新日期：2008-03-13 00:00:00

abstract：:Neurons in the developing rodent cortex are generated from radial glial cells that function as neural stem cells. These epithelial cells line the cerebral ventricles and generate intermediate progenitor cells that migrate into the subventricular zone (SVZ) and proliferate to increase neuronal number. The developing hu...

journal_title：Nature

authors： Hansen DV,Lui JH,Parker PR,Kriegstein AR

更新日期：2010-03-25 00:00:00

abstract：:The sequencing of ancient DNA has enabled the reconstruction of speciation, migration and admixture events for extinct taxa1. However, the irreversible post-mortem degradation2 of ancient DNA has so far limited its recovery-outside permafrost areas-to specimens that are not older than approximately 0.5 million years (...

journal_title：Nature

authors： Cappellini E,Welker F,Pandolfi L,Ramos-Madrigal J,Samodova D,Rüther PL,Fotakis AK,Lyon D,Moreno-Mayar JV,Bukhsianidze M,Rakownikow Jersie-Christensen R,Mackie M,Ginolhac A,Ferring R,Tappen M,Palkopoulou E,Dickinson MR,S

更新日期：2019-10-01 00:00:00

abstract：:Although many animals use the Earth's magnetic field for orientation and navigation, the precise biophysical mechanisms underlying magnetic sensing have been elusive. One theoretical model proposes that geomagnetic fields are perceived by chemical reactions involving specialized photoreceptors. However, the specific p...

journal_title：Nature

authors： Gegear RJ,Casselman A,Waddell S,Reppert SM

更新日期：2008-08-21 00:00:00

abstract：: ...

journal_title：Nature

authors： Hills R,Kulkarni G,Meerburg PD,Puchwein E

更新日期：2018-12-01 00:00:00

abstract：:Activated T lymphocytes differentiate into effector cells tailored to meet disparate challenges to host integrity. For example, type 1 and type 2 helper (T(H)1 and T(H)2) cells secrete cytokines that enhance cell-mediated and humoral immunity, respectively. The chemokine monocyte chemoattractant protein-1 (MCP-1) can ...

journal_title：Nature

authors： Gu L,Tseng S,Horner RM,Tam C,Loda M,Rollins BJ

更新日期：2000-03-23 00:00:00

abstract：:Many animals rely on an internal heading representation when navigating in varied environments1-10. How this representation is linked to the sensory cues that define different surroundings is unclear. In the fly brain, heading is represented by 'compass' neurons that innervate a ring-shaped structure known as the elli...

journal_title：Nature

authors： Kim SS,Hermundstad AM,Romani S,Abbott LF,Jayaraman V

更新日期：2019-12-01 00:00:00

abstract：:The disease non-insulin-dependent (type 2) diabetes mellitus (NIDDM) is characterized by abnormally high blood glucose resulting from a relative deficiency of insulin. It affects about 2% of the world's population and treatment of diabetes and its complications are an increasing health-care burden. Genetic factors are...

journal_title：Nature

authors： Yamagata K,Oda N,Kaisaki PJ,Menzel S,Furuta H,Vaxillaire M,Southam L,Cox RD,Lathrop GM,Boriraj VV,Chen X,Cox NJ,Oda Y,Yano H,Le Beau MM,Yamada S,Nishigori H,Takeda J,Fajans SS,Hattersley AT,Iwasaki N,Hansen T,

更新日期：1996-12-05 00:00:00

abstract：:The transcriptional underpinnings of brain development remain poorly understood, particularly in humans and closely related non-human primates. We describe a high-resolution transcriptional atlas of rhesus monkey (Macaca mulatta) brain development that combines dense temporal sampling of prenatal and postnatal periods...

journal_title：Nature

authors： Bakken TE,Miller JA,Ding SL,Sunkin SM,Smith KA,Ng L,Szafer A,Dalley RA,Royall JJ,Lemon T,Shapouri S,Aiona K,Arnold J,Bennett JL,Bertagnolli D,Bickley K,Boe A,Brouner K,Butler S,Byrnes E,Caldejon S,Carey A,Cate

更新日期：2016-07-21 00:00:00

abstract：:Calnexin, an endoplasmic reticulum transmembrane protein, represents a new type of molecular chaperone that selectively associates in a transient fashion with newly synthesized monomeric glycoproteins in HepG2 cells. Calnexin only recognizes glycoproteins when they are incompletely folded. Dissociation of glycoprotein...

journal_title：Nature

authors： Ou WJ,Cameron PH,Thomas DY,Bergeron JJ

更新日期：1993-08-26 00:00:00

abstract：:The abundant nuclear enzyme poly(ADP-ribose) polymerase catalyses the synthesis of poly(ADP-ribose) from nicotinamide adenine dinucleotide (NAD+). This protein has an N-terminal DNA-binding domain containing two zinc-fingers, which is linked to the C-terminal NAD(+)-binding domain by a short region containing several ...

journal_title：Nature

authors： Satoh MS,Lindahl T

更新日期：1992-03-26 00:00:00

abstract：:Transection of a sensory nerve in adults results in profound abnormalities in sensory perception, even if the severed nerve is surgically repaired to facilitate accurate nerve regeneration. In marked contrast, fewer perceptual errors follow nerve transection and surgical repair in children. The basis for this superior...

journal_title：Nature

authors： Florence SL,Jain N,Pospichal MW,Beck PD,Sly DL,Kaas JH

更新日期：1996-05-02 00:00:00

abstract：:The kidney has been widely exploited as a model system for the study of tissue inductions regulating vertebrate organogenesis. Kidney development is initiated by the ingrowth of the Wolfian duct-derived ureteric bud into the presumptive kidney mesenchyme. In response to a signal from the ureter, mesenchymal cells cond...

journal_title：Nature

authors： Stark K,Vainio S,Vassileva G,McMahon AP

更新日期：1994-12-15 00:00:00

abstract：:How to image objects that are hidden from a camera's view is a problem of fundamental importance to many fields of research, with applications in robotic vision, defence, remote sensing, medical imaging and autonomous vehicles. Non-line-of-sight (NLOS) imaging at macroscopic scales has been demonstrated by scanning a ...

journal_title：Nature

authors： O'Toole M,Lindell DB,Wetzstein G

更新日期：2018-03-15 00:00:00

abstract：:C-type (Ca(2+)-dependent) animal lectins such as mannose-binding proteins mediate many cell-surface carbohydrate-recognition events. The crystal structure at 1.7 A resolution of the carbohydrate-recognition domain of rat mannose-binding protein complexed with an oligomannose asparaginyl-oligosaccharide reveals that Ca...

journal_title：Nature

authors： Weis WI,Drickamer K,Hendrickson WA

更新日期：1992-11-12 00:00:00

abstract：:Joining dissimilar materials such as plastics and metals in engineered structures remains a challenge1. Mechanical fastening, conventional welding and adhesive bonding are examples of techniques currently used for this purpose, but each of these methods presents its own set of problems2 such as formation of stress con...

journal_title：Nature

authors： Rivera J,Hosseini MS,Restrepo D,Murata S,Vasile D,Parkinson DY,Barnard HS,Arakaki A,Zavattieri P,Kisailus D

更新日期：2020-10-01 00:00:00

abstract：:The recently emerged fields of metamaterials and transformation optics promise a family of exciting applications such as invisibility, optical imaging with deeply subwavelength resolution and nanophotonics with the potential for much faster information processing. The possibility of creating optical negative-index met...

journal_title：Nature

authors： Xiao S,Drachev VP,Kildishev AV,Ni X,Chettiar UK,Yuan HK,Shalaev VM

更新日期：2010-08-05 00:00:00

abstract：:The mevalonate pathway produces isoprenoids that are vital for diverse cellular functions, ranging from cholesterol synthesis to growth control. Several mechanisms for feedback regulation of low-density-lipoprotein receptors and of two enzymes involved in mevalonate biosynthesis ensure the production of sufficient mev...

journal_title：Nature

authors： Goldstein JL,Brown MS

更新日期：1990-02-01 00:00:00