Imperfect vaccines and the evolution of pathogen virulence.

abstract：:It has been known for some 50 years that birds use photoreceptors in or near the hypothalamus to mediate the photoperiodic responses that control seasonal breeding. So far, however, attempts to identify the photopigment by determining an action spectrum have failed. The problems stem from the selective filtering of li...

journal_title：Nature

authors： Foster RG,Follett BK,Lythgoe JN

更新日期：1985-01-03 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：:Type Ia supernovae are thought to result from thermonuclear explosions of carbon-oxygen white dwarf stars. Existing models generally explain the observed properties, with the exception of the sub-luminous 1991bg-like supernovae. It has long been suspected that the merger of two white dwarfs could give rise to a type I...

journal_title：Nature

authors： Pakmor R,Kromer M,Röpke FK,Sim SA,Ruiter AJ,Hillebrandt W

更新日期：2010-01-07 00:00:00

abstract：:The tropical forests of Borneo and Amazonia may each contain more tree species diversity in half a square kilometre than do all the temperate forests of Europe, North America, and Asia combined. Biologists have long been fascinated by this disparity, using it to investigate potential drivers of biodiversity. Latitudin...

journal_title：Nature

authors： Usinowicz J,Chang-Yang CH,Chen YY,Clark JS,Fletcher C,Garwood NC,Hao Z,Johnstone J,Lin Y,Metz MR,Masaki T,Nakashizuka T,Sun IF,Valencia R,Wang Y,Zimmerman JK,Ives AR,Wright SJ

更新日期：2017-10-05 00:00:00

abstract：:Since 1814, when rubella was first described, the origins of the disease and its causative agent, rubella virus (Matonaviridae: Rubivirus), have remained unclear1. Here we describe ruhugu virus and rustrela virus in Africa and Europe, respectively, which are, to our knowledge, the first known relatives of rubella viru...

journal_title：Nature

authors： Bennett AJ,Paskey AC,Ebinger A,Pfaff F,Priemer G,Höper D,Breithaupt A,Heuser E,Ulrich RG,Kuhn JH,Bishop-Lilly KA,Beer M,Goldberg TL

更新日期：2020-10-01 00:00:00

abstract：:Many receptors for neuropeptides and hormones are coupled with the heterotrimeric G(i) protein, which activates the p42/44 mitogen-activated protein kinase (ERK/MAPK) cascade through both the alpha- and betagamma-subunits of G(i). The betagamma-subunit activates the ERK/MAPK cascade through tyrosine kinase. Constituti...

journal_title：Nature

authors： Mochizuki N,Ohba Y,Kiyokawa E,Kurata T,Murakami T,Ozaki T,Kitabatake A,Nagashima K,Matsuda M

更新日期：1999-08-26 00:00:00

abstract：: ...

journal_title：Nature

authors：

更新日期：2019-02-01 00:00:00

abstract：:As oligodendrocytes wrap axons of the central nervous system (CNS) with insulating myelin sheaths, sodium channels that are initially continuously distributed along axons become segregated into regularly spaced gaps in the myelin called nodes of Ranvier. It is not known whether the regular spacing of nodes results fro...

journal_title：Nature

authors： Kaplan MR,Meyer-Franke A,Lambert S,Bennett V,Duncan ID,Levinson SR,Barres BA

更新日期：1997-04-17 00:00:00

abstract：:Mammalian telomeres repress DNA-damage activation at natural chromosome ends by recruiting specific inhibitors of the DNA-damage machinery that form a protective complex termed shelterin. Within this complex, TRF2 (also known as TERF2) has a crucial role in end protection through the suppression of ATM activation and ...

journal_title：Nature

authors： Okamoto K,Bartocci C,Ouzounov I,Diedrich JK,Yates JR 3rd,Denchi EL

更新日期：2013-02-28 00:00:00

abstract：:Recent studies have suggested a critical role of specific gene loss in several embryonic tumours and certain adult cancers. In retinoblastoma, hemizygosity or homozygosity of a recessive mutant allele results in the loss of normal gene product, and this seems to cause the manifestation of the disorder. Familial polypo...

journal_title：Nature

authors： Okamoto M,Sasaki M,Sugio K,Sato C,Iwama T,Ikeuchi T,Tonomura A,Sasazuki T,Miyaki M

更新日期：1988-01-21 00:00:00

abstract：:Galactose oxidase is an extracellular enzyme secreted by the fungus Dactylium dendroides. It is monomeric, with a relative molecular mass of 68,000, catalyses the stereospecific oxidation of a broad range of primary alcohol substrates and possesses a unique mononuclear copper site essential for catalysing a two-electr...

journal_title：Nature

authors： Ito N,Phillips SE,Stevens C,Ogel ZB,McPherson MJ,Keen JN,Yadav KD,Knowles PF

更新日期：1991-03-07 00:00:00

abstract：:Since the discovery of insulin nearly 70 years ago, there has been no problem more fundamental to diabetes research than understanding how insulin works at the cellular level. Insulin binds to the alpha subunit of the insulin receptor which activates the tyrosine kinase in the beta subunit, but the molecular events li...

journal_title：Nature

authors： Sun XJ,Rothenberg P,Kahn CR,Backer JM,Araki E,Wilden PA,Cahill DA,Goldstein BJ,White MF

更新日期：1991-07-04 00:00:00

abstract：:Defects in insulin signalling are among the most common and earliest defects that predispose an individual to the development of type 2 diabetes. MicroRNAs have been identified as a new class of regulatory molecules that influence many biological functions, including metabolism. However, the direct regulation of insul...

journal_title：Nature

authors： Trajkovski M,Hausser J,Soutschek J,Bhat B,Akin A,Zavolan M,Heim MH,Stoffel M

更新日期：2011-06-08 00:00:00

abstract：:A fundamental tenet of cerebellar learning theories asserts that climbing fibre afferents from the inferior olive provide a teaching signal that promotes the gradual adaptation of movements. Data from several forms of motor learning provide support for this tenet. In pavlovian eyelid conditioning, for example, where a...

journal_title：Nature

authors： Medina JF,Nores WL,Mauk MD

更新日期：2002-03-21 00:00:00

abstract：:The upper temperature at which a living system can exist is limited by the hydrolytic breakdown rate of its chemical constituents. The peptide bonds of proteins, the phosphodiester and N-glycosyl bonds in RNA and DNA, and the pyrophosphate and N-glycosyl bonds in nucleotides such as ATP and NAD are among the more impo...

journal_title：Nature

authors： White RH

更新日期：1984-08-02 00:00:00

abstract：:Ia antigens are membrane-bound glycoproteins that play a part in antigen recognition and subsequent cell-cell interactions in the immune response. In the mouse they are coded for by the I region of the major histocompatibility complex H-2 and have been demonstrated on B lymphocytes, monocytes, activated T cells, macro...

journal_title：Nature

authors： de Waal RM,Bogman MJ,Maass CN,Cornelissen LM,Tax WJ,Koene RA

更新日期：1983-06-02 00:00:00

abstract：:Pairwise recognition of splice sites as a result of a scanning mechanism is an attractive model to explain the coordination of vertebrate splicing. Such a mechanism would predict a polarity-of-site recognition in the scanned unit, but no evidence for a polarity gradient across introns has been found. We have suggested...

journal_title：Nature

authors： Niwa M,MacDonald CC,Berget SM

更新日期：1992-11-19 00:00:00

abstract：:A re-analysis of published data on mouse mutation rates induced by X and gamma rays suggests that the kinetics of induction can be analysed by fitting the data to a parabolic curve. We interpret this to mean that a substantial proportion of the induced mutations results from gross chromosomal changes such as deletions...

journal_title：Nature

authors： Abrahamson S,Wolff S

更新日期：1976-12-23 00:00:00

abstract：:Muscarinic receptors of cardiac pacemaker and atrial cells are linked to a potassium channel (IK.ACh) by a pertussis toxin-sensitive GTP-binding protein. The dissociation of G-proteins leads to the generation of two potential transducing elements, alpha-GTP and beta gamma. IK.ACh is activated by G-protein alpha- and b...

journal_title：Nature

authors： Kim D,Lewis DL,Graziadei L,Neer EJ,Bar-Sagi D,Clapham DE

更新日期：1989-02-09 00:00:00

abstract：:Since the early 1980s, most electronics have relied on the use of complementary metal-oxide-semiconductor (CMOS) transistors. However, the principles of CMOS operation, involving a switchable semiconductor conductance controlled by an insulating gate, have remained largely unchanged, even as transistors are miniaturiz...

journal_title：Nature

authors： Manipatruni S,Nikonov DE,Lin CC,Gosavi TA,Liu H,Prasad B,Huang YL,Bonturim E,Ramesh R,Young IA

更新日期：2019-01-01 00:00:00

abstract：:Behavioural studies and field observations demonstrate that echolocating bats simultaneously perceive range, direction and shape of multiple objects in the environment as acoustic images derived from echoes. Cortical echo delay-tuned neurons contribute to the perception of object range, because focal inactivation of t...

journal_title：Nature

authors： Dear SP,Simmons JA,Fritz J

更新日期：1993-08-12 00:00:00

abstract：:Quantum degenerate Fermi gases provide a remarkable opportunity to study strongly interacting fermions. In contrast to other Fermi systems, such as superconductors, neutron stars or the quark-gluon plasma of the early Universe, these gases have low densities and their interactions can be precisely controlled over an e...

journal_title：Nature

authors： Zwierlein MW,Abo-Shaeer JR,Schirotzek A,Schunck CH,Ketterle W

更新日期：2005-06-23 00:00:00

abstract：:The planet in the system HD209458 is the first one for which repeated transits across the stellar disk have been observed. Together with radial velocity measurements, this has led to a determination of the planet's radius and mass, confirming it to be a gas giant. But despite numerous searches for an atmospheric signa...

journal_title：Nature

authors： Vidal-Madjar A,Des Etangs AL,Désert JM,Ballester GE,Ferlet R,Hébrard G,Mayor M

更新日期：2003-03-13 00:00:00

abstract：:The Gram-negative bacterium Myxococcus xanthus has a complex life cycle during which large amounts of a protein of relative molecular mass (Mr) 19,000, known as protein S, are assembled into a spore surface coat by a process that specifically requires calcium ions. The gene for protein S has been cloned and the DNA se...

journal_title：Nature

authors： Wistow G,Summers L,Blundell T

更新日期：1985-06-27 00:00:00

abstract：:More than 30 years ago, human beings looked back from the Moon to see the magnificent spectacle of Earth-rise. The technology that put us into space has since been used to assess the damage we are doing to our natural environment and is now being harnessed to monitor and predict diseases through space and time. Satell...

journal_title：Nature

authors： Rogers DJ,Randolph SE,Snow RW,Hay SI

更新日期：2002-02-07 00:00:00

abstract：:Hypermethylation is associated with the silencing of tumour susceptibility genes in several forms of cancer; however, the mechanisms responsible for this aberrant methylation are poorly understood. The prototypic DNA methyltransferase, DNMT1, has been widely assumed to be responsible for most of the methylation of the...

journal_title：Nature

authors： Rhee I,Jair KW,Yen RW,Lengauer C,Herman JG,Kinzler KW,Vogelstein B,Baylin SB,Schuebel KE

更新日期：2000-04-27 00:00:00

abstract：:Epithelial organs undergo steady-state turnover throughout adult life, with old cells being continually replaced by the progeny of stem cell divisions. To avoid hyperplasia or atrophy, organ turnover demands strict equilibration of cell production and loss. However, the mechanistic basis of this equilibrium is unknown...

journal_title：Nature

authors： Liang J,Balachandra S,Ngo S,O'Brien LE

更新日期：2017-08-31 00:00:00

abstract：:The first open meeting to discuss the growing issue of commercialism in academic research was convened by the New York Bar Association's patent committee. Participants included Steven Muller, president of Johns Hopkins University, Joshua Lederberg, president of Rockefeller University, and A. Thomas Bartlett, presiden...

journal_title：Nature

authors： Stein MD

更新日期：1982-04-29 00:00:00

abstract：:During the subduction of oceanic lithosphere, water is liberated from minerals by progressive dehydration reactions and is thought to be critical to several geologically important processes such as island-arc volcanism, intermediate-depth seismicity and chemical exchange between the subducting lithosphere and mantle. ...

journal_title：Nature

authors： Bina CR,Navrotsky A

更新日期：2000-12-14 00:00:00

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