Acetylcholine activation of single muscarinic K+ channels in isolated pacemaker cells of the mammalian heart.

abstract：:Analysis of the genes that control the early events of Drosophila embryogenesis is providing details of the molecular processes underlying the positional specification of cells. There are two distinct phases: the first precedes the cellularization of the blastoderm embryo and is associated with a cascade of interactio...

journal_title：Nature

authors： Ingham PW

更新日期：1988-09-01 00:00:00

abstract：:Acquired drug resistance is a major problem in the treatment of cancer. Of the more than 500,000 annual deaths from cancer in the United States, many follow the development of resistance to chemotherapy. The emergence of resistance depends in part on the genetic instability, heterogeneity and high mutational rate of t...

journal_title：Nature

authors： Boehm T,Folkman J,Browder T,O'Reilly MS

更新日期：1997-11-27 00:00:00

abstract：:Convection is a fundamental physical process in the fluid cores of planets. It is the primary transport mechanism for heat and chemical species and the primary energy source for planetary magnetic fields. Key properties of convection-such as the characteristic flow velocity and length scale-are poorly quantified in pl...

journal_title：Nature

authors： Guervilly C,Cardin P,Schaeffer N

更新日期：2019-06-01 00:00:00

abstract：:Transport of fermions, particles with half-integer spin, is central to many fields of physics. Electron transport runs modern technology, defining states of matter such as superconductors and insulators, and electron spin is being explored as a new carrier of information. Neutrino transport energizes supernova explosi...

journal_title：Nature

authors： Sommer A,Ku M,Roati G,Zwierlein MW

更新日期：2011-04-14 00:00:00

abstract：:The proteins encoded by the ras oncogene are thought to trigger expression of the transformed phenotype in some types of cancer cells. In human cells, the ras protein family consists of several members including normal (proto-oncogene) and mutant (oncogene) forms. In general, the proto-oncogene forms are thought to be...

journal_title：Nature

authors： Feramisco JR,Clark R,Wong G,Arnheim N,Milley R,McCormick F

更新日期：1985-04-18 00:00:00

abstract：:On the basis of their primary structure, the lysine-rich histones are a unified family of proteins. Each has an amino acid chain which falls into three distinct domains. Only the central domain (approximately 80 residues) is in a folded conformation. It is protected from trypsin digestion in chromatin and corresponds ...

journal_title：Nature

authors： Allan J,Hartman PG,Crane-Robinson C,Aviles FX

更新日期：1980-12-25 00:00:00

abstract：:A detailed description of the interactions between an antibody and its epitope is necessary to allow an understanding of the way in which antibodies bind to antigenic surfaces presented by foreign molecules. Ideally this should be done by analysis of crystal structures of antibody-antigen complexes, but so far only tw...

journal_title：Nature

authors： Roberts S,Cheetham JC,Rees AR

更新日期：1987-08-20 00:00:00

abstract：: ...

journal_title：Nature

authors：

更新日期：2018-10-01 00:00:00

abstract：:Processes such as the scattering of alpha particles ((4)He), the triple-alpha reaction, and alpha capture play a major role in stellar nucleosynthesis. In particular, alpha capture on carbon determines the ratio of carbon to oxygen during helium burning, and affects subsequent carbon, neon, oxygen, and silicon burning...

journal_title：Nature

authors： Elhatisari S,Lee D,Rupak G,Epelbaum E,Krebs H,Lähde TA,Luu T,Meißner UG

更新日期：2015-12-03 00:00:00

abstract：:During cell division, sister chromosomes segregate from each other on a microtubule-based structure called the mitotic spindle. Proteins bind to the centromere, a region of chromosomal DNA, to form the kinetochore, which mediates chromosome attachment to the mitotic spindle microtubules. In the budding yeast Saccharom...

journal_title：Nature

authors： Hyman AA,Middleton K,Centola M,Mitchison TJ,Carbon J

更新日期：1992-10-08 00:00:00

abstract：:Mutations in PIK3CA, which encodes the p110α subunit of the insulin-activated phosphatidylinositol-3 kinase (PI3K), and loss of function mutations in PTEN, which encodes a phosphatase that degrades the phosphoinositide lipids generated by PI3K, are among the most frequent events in human cancers1,2. However, pharmacol...

journal_title：Nature

authors： Hopkins BD,Pauli C,Du X,Wang DG,Li X,Wu D,Amadiume SC,Goncalves MD,Hodakoski C,Lundquist MR,Bareja R,Ma Y,Harris EM,Sboner A,Beltran H,Rubin MA,Mukherjee S,Cantley LC

更新日期：2018-08-01 00:00:00

abstract：:Dendritic cells (DCs) orchestrate a repertoire of immune responses that bring about resistance to infection and silencing or tolerance to self. In the settings of infection and cancer, microbes and tumours can exploit DCs to evade immunity, but DCs also can generate resistance, a capacity that is readily enhanced with...

journal_title：Nature

authors： Steinman RM,Banchereau J

更新日期：2007-09-27 00:00:00

abstract：:The human serum response factor is a transcription factor belonging to the MADS domain protein family with members characterized from the plant and animal kingdoms. The X-ray crystal structure of the serum response factor core in a specific-recognition DNA complex shows that the functions of DNA binding, dimerization ...

journal_title：Nature

authors： Pellegrini L,Tan S,Richmond TJ

更新日期：1995-08-10 00:00:00

abstract：:The upright posture and obligatory bipedalism of modern humans are unique among living primates. The evolutionary history of this behaviour has traditionally been pursued by functional analysis of the postcranial skeleton and the preserved footprint trails of fossil hominids. Here we report a systematic attempt to rec...

journal_title：Nature

authors： Spoor F,Wood B,Zonneveld F

更新日期：1994-06-23 00:00:00

abstract：:The development of new chemical transformations based on catalytic functionalization of unactivated C-H bonds has the potential to simplify the synthesis of complex molecules dramatically. Transition metal catalysis has emerged as a powerful tool with which to convert these unreactive bonds into carbon-carbon and carb...

journal_title：Nature

authors： McNally A,Haffemayer B,Collins BS,Gaunt MJ

更新日期：2014-06-05 00:00:00

abstract：:X-chromosome inactivation results in the strictly cis-limited inactivation of many but not all genes on one of the two X chromosomes during early development in somatic cells of mammalian females. One feature of virtually all models of X inactivation is the existence of an X-inactivation centre (XIC) required in cis f...

journal_title：Nature

authors： Brown CJ,Lafreniere RG,Powers VE,Sebastio G,Ballabio A,Pettigrew AL,Ledbetter DH,Levy E,Craig IW,Willard HF

更新日期：1991-01-03 00:00:00

abstract：:The normal cellular homologue of the acutely transforming oncogene v-raf is c-raf-1, which encodes a serine/threonine protein kinase that is activated by many extracellular stimuli. The physiological substrates of the protein c-Raf-1 are unknown. The mitogen-activated protein (MAP) kinases Erk1 and 2 are also activate...

journal_title：Nature

authors： Kyriakis JM,App H,Zhang XF,Banerjee P,Brautigan DL,Rapp UR,Avruch J

更新日期：1992-07-30 00:00:00

abstract：:Transport vesicles derived from the Golgi apparatus are thought to mediate biosynthetic transport across the Golgi stack. These vesicles are surrounded by a protein coat whose principal constituents are coatomer (a complex of seven distinct subunits or COPs) and ADP-ribosylation factor (ARF, an N-myristylated small GT...

journal_title：Nature

authors： Orcl L,Palmer DJ,Amherdt M,Rothman JE

更新日期：1993-08-19 00:00:00

abstract：:Finite element analysis (FEA) is used by industrial designers and biomechanicists to estimate the performance of engineered structures or human skeletal and soft tissues subjected to varying regimes of stress and strain. FEA is rarely applied to problems of biomechanical design in animals, despite its potential to inf...

journal_title：Nature

authors： Rayfield EJ,Norman DB,Horner CC,Horner JR,Smith PM,Thomason JJ,Upchurch P

更新日期：2001-02-22 00:00:00

abstract：:Contraction of cardiac muscle depends on a transient rise of intracellular calcium concentration ([Ca2+]i) which is initiated by the action potential. It has, however, also been suggested that [Ca2+]i can fluctuate in the absence of changes in membrane potential. The evidence for this is indirect and comes from observ...

journal_title：Nature

authors： Orchard CH,Eisner DA,Allen DG

更新日期：1983-08-25 00:00:00

abstract：:For cells of the innate immune system to mount a host defence response to infection, they must recognize products of microbial pathogens such as lipopolysaccharide (LPS), the endotoxin secreted by Gram-negative bacteria. These cellular responses require intracellular signalling pathways, such as the four MAP kinase (M...

journal_title：Nature

authors： Han J,Jiang Y,Li Z,Kravchenko VV,Ulevitch RJ

更新日期：1997-03-20 00:00:00

abstract：:Called the "mystery of mysteries" by Darwin, speciation is still a little-understood area of evolution. Genetic analysis, however, has yielded new generalizations about speciation and suggests promising avenues of research. ...

journal_title：Nature

authors： Coyne JA

更新日期：1992-02-06 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 UK Farm-Scale Evaluations (FSE) compared the effects on biodiversity of management of genetically modified herbicide-tolerant (GMHT) spring-sown crops with conventional crop management. The FSE reported larger weed abundance under GMHT management for fodder maize, one of three crops studied. Increased seed product...

journal_title：Nature

authors： Perry JN,Firbank LG,Champion GT,Clark SJ,Heard MS,May MJ,Hawes C,Squire GR,Rothery P,Woiwod IP,Pidgeon JD

更新日期：2004-03-18 00:00:00

abstract：:The determination of molecular masses from barometric sedimentation profiles, a main topic in ultracentrifugal analysis, is thought to be quantitatively correct for non-interacting particles. Whereas this expectation is justified for uncharged colloids or macromolecules at low volume fractions, early ultracentrifugati...

journal_title：Nature

authors： Raşa M,Philipse AP

更新日期：2004-06-24 00:00:00

abstract：:Ultrathin ferroelectric materials could potentially enable low-power perovskite ferroelectric tetragonality logic and nonvolatile memories1,2. As ferroelectric materials are made thinner, however, the ferroelectricity is usually suppressed. Size effects in ferroelectrics have been thoroughly investigated in perovskite...

journal_title：Nature

authors： Cheema SS,Kwon D,Shanker N,Dos Reis R,Hsu SL,Xiao J,Zhang H,Wagner R,Datar A,McCarter MR,Serrao CR,Yadav AK,Karbasian G,Hsu CH,Tan AJ,Wang LC,Thakare V,Zhang X,Mehta A,Karapetrova E,Chopdekar RV,Shafer P,Arenh

更新日期：2020-04-01 00:00:00

abstract：:Silbo Gomero is a whistled language that is a rare and endangered surrogate of Spanish, used by shepherds on the island of La Gomera in the Canary Islands for communication over long distances on difficult terrain. Here we show that areas of the brain normally associated with spoken-language function are also activate...

journal_title：Nature

authors： Carreiras M,Lopez J,Rivero F,Corina D

更新日期：2005-01-06 00:00:00

abstract：: ...

journal_title：Nature

authors：

更新日期：2019-01-01 00:00:00

abstract：:Interleukin-2 (IL-2) is a regulatory peptide important for the growth and differentiation of antigen-specific T lymphocytes and large granular lymphocytes. Interaction of IL-2 with its specific receptor results in the promotion of S-phase progression as well as, in certain circumstances, the production and release of ...

journal_title：Nature

authors： Farrar WL,Anderson WB

更新日期：1985-05-16 00:00:00

abstract：:Regulatory T cells (Treg cells), a distinct subset of CD4+ T cells, are necessary for the maintenance of immune self-tolerance and homeostasis1,2. Recent studies have demonstrated that Treg cells exhibit a unique metabolic profile, characterized by an increase in mitochondrial metabolism relative to other CD4+ effecto...

journal_title：Nature

authors： Weinberg SE,Singer BD,Steinert EM,Martinez CA,Mehta MM,Martínez-Reyes I,Gao P,Helmin KA,Abdala-Valencia H,Sena LA,Schumacker PT,Turka LA,Chandel NS

更新日期：2019-01-01 00:00:00