Structure and function of the Salmonella Typhi chimaeric A(2)B(5) typhoid toxin.

abstract：:The Redfield ratio of 106 carbon:16 nitrogen:1 phosphorus in marine phytoplankton is one of the foundations of ocean biogeochemistry, with applications in algal physiology, palaeoclimatology and global climate change. However, this ratio varies substantially in response to changes in algal nutrient status and taxonomi...

journal_title：Nature

authors： Sañudo-Wilhelmy SA,Tovar-Sanchez A,Fu FX,Capone DG,Carpenter EJ,Hutchins DA

更新日期：2004-12-16 00:00:00

abstract：:Specific chromosomal deletions sometimes associated with tumours such as retinoblastoma (chromosome 13q14) and Wilm's tumour (chromosome 11p13) have led to the hypothesis that recessive genes may be involved in tumorigenesis. This hypothesis is supported by demonstration of allele loss specific for these regions using...

journal_title：Nature

authors： Naylor SL,Johnson BE,Minna JD,Sakaguchi AY

更新日期：1987-10-01 00:00:00

abstract：:The ability to trap an object-whether a single atom or a macroscopic entity-affects fields as diverse as quantum optics, soft condensed-matter physics, biophysics and clinical medicine. Many sophisticated methodologies have been developed to counter the randomizing effect of Brownian motion in solution, but stable tra...

journal_title：Nature

authors： Krishnan M,Mojarad N,Kukura P,Sandoghdar V

更新日期：2010-10-07 00:00:00

abstract：:Earth's climate history is often understood by breaking it down into constituent climatic epochs1. Over the Common Era (the past 2,000 years) these epochs, such as the Little Ice Age2-4, have been characterized as having occurred at the same time across extensive spatial scales5. Although the rapid global warming seen...

journal_title：Nature

authors： Neukom R,Steiger N,Gómez-Navarro JJ,Wang J,Werner JP

更新日期：2019-07-01 00:00:00

abstract：:As the extracellular matrix at the original site of a neuromuscular junction seems to play a major part in the specificity of synaptic regeneration, considerable attention has been paid to unique molecules localized to this region. Here we describe an extracellular matrix glycoprotein of the elasmobranch electric orga...

journal_title：Nature

authors： Caroni P,Carlson SS,Schweitzer E,Kelly RB

更新日期：1985-04-04 00:00:00

abstract：:Abscisic acid (ABA) is a ubiquitous hormone that regulates plant growth, development and responses to environmental stresses. Its action is mediated by the PYR/PYL/RCAR family of START proteins, but it remains unclear how these receptors bind ABA and, in turn, how hormone binding leads to inhibition of the downstream ...

journal_title：Nature

authors： Melcher K,Ng LM,Zhou XE,Soon FF,Xu Y,Suino-Powell KM,Park SY,Weiner JJ,Fujii H,Chinnusamy V,Kovach A,Li J,Wang Y,Li J,Peterson FC,Jensen DR,Yong EL,Volkman BF,Cutler SR,Zhu JK,Xu HE

更新日期：2009-12-03 00:00:00

abstract：:The ability to form integrated circuits on flexible sheets of plastic enables attributes (for example conformal and flexible formats and lightweight and shock resistant construction) in electronic devices that are difficult or impossible to achieve with technologies that use semiconductor wafers or glass plates as sub...

journal_title：Nature

authors： Cao Q,Kim HS,Pimparkar N,Kulkarni JP,Wang C,Shim M,Roy K,Alam MA,Rogers JA

更新日期：2008-07-24 00:00:00

abstract：:Glutamate transporters are integral membrane proteins that catalyse neurotransmitter uptake from the synaptic cleft into the cytoplasm of glial cells and neurons. Their mechanism of action involves transitions between extracellular (outward)-facing and intracellular (inward)-facing conformations, whereby substrate bin...

journal_title：Nature

authors： Akyuz N,Altman RB,Blanchard SC,Boudker O

更新日期：2013-10-03 00:00:00

abstract：:Nuclear exclusion of the PTEN (phosphatase and tensin homologue deleted in chromosome 10) tumour suppressor has been associated with cancer progression. However, the mechanisms leading to this aberrant PTEN localization in human cancers are currently unknown. We have previously reported that ubiquitinylation of PTEN a...

journal_title：Nature

authors： Song MS,Salmena L,Carracedo A,Egia A,Lo-Coco F,Teruya-Feldstein J,Pandolfi PP

更新日期：2008-10-09 00:00:00

abstract：:The cranial morphology of the earliest known hominins in the genus Australopithecus remains unclear. The oldest species in this genus (Australopithecus anamensis, specimens of which have been dated to 4.2-3.9 million years ago) is known primarily from jaws and teeth, whereas younger species (dated to 3.5-2.0 million y...

journal_title：Nature

authors： Haile-Selassie Y,Melillo SM,Vazzana A,Benazzi S,Ryan TM

更新日期：2019-09-01 00:00:00

abstract：:Excitatory amino acids (EAAs) are important neurotransmitters in the vertebrate central nervous system. Electrophysiological and ligand-binding studies indicate that at least three different receptor subtypes for EAAs exist--N-methyl-D-aspartate, kainate and quisqualate receptor subtypes--on the basis of the preferred...

journal_title：Nature

authors： Wada K,Dechesne CJ,Shimasaki S,King RG,Kusano K,Buonanno A,Hampson DR,Banner C,Wenthold RJ,Nakatani Y

更新日期：1989-12-07 00:00:00

abstract：: ...

journal_title：Nature

authors： Gewin V

更新日期：2018-12-01 00:00:00

abstract：:The extent to which an organism is selected to invest in defences against pathogens and parasites depends on the advantages that ensue should infection occur, but also on the costs of maintaining defences in the absence of infection. The presence of heritable variation in resistance suggests that costs exist, but we k...

journal_title：Nature

authors： Kraaijeveld AR,Godfray HC

更新日期：1997-09-18 00:00:00

abstract：:The neural substrates that the fruitfly Drosophila uses to sense smell, taste and light share marked structural and functional similarities with ours, providing attractive models to dissect sensory stimulus processing. Here we focus on two of the remaining and less understood prime sensory modalities: graviception and...

journal_title：Nature

authors： Kamikouchi A,Inagaki HK,Effertz T,Hendrich O,Fiala A,Göpfert MC,Ito K

更新日期：2009-03-12 00:00:00

abstract：:Members of the Hedgehog family of secreted proteins control a number of important inductive interactions in the development of both vertebrates and Drosophila, but little is known about the ways in which their signalling activities are transduced. In Drosophila, hedgehog is one of the segment-polarity genes, mutations...

journal_title：Nature

authors： van den Heuvel M,Ingham PW

更新日期：1996-08-08 00:00:00

abstract：:The reliable detection of single quantum particles has revolutionized the field of quantum optics and quantum information processing. For several years, researchers have aspired to extend such detection possibilities to larger-scale, strongly correlated quantum systems in order to record in situ images of a quantum fl...

journal_title：Nature

authors： Sherson JF,Weitenberg C,Endres M,Cheneau M,Bloch I,Kuhr S

更新日期：2010-09-02 00:00:00

abstract：:Complex-oxide materials exhibit a vast range of functional properties desirable for next-generation electronic, spintronic, magnetoelectric, neuromorphic, and energy conversion storage devices1-4. Their physical functionalities can be coupled by stacking layers of such materials to create heterostructures and can be f...

journal_title：Nature

authors： Kum HS,Lee H,Kim S,Lindemann S,Kong W,Qiao K,Chen P,Irwin J,Lee JH,Xie S,Subramanian S,Shim J,Bae SH,Choi C,Ranno L,Seo S,Lee S,Bauer J,Li H,Lee K,Robinson JA,Ross CA,Schlom DG,Rzchowski MS,Eom CB,Kim J

更新日期：2020-02-01 00:00:00

abstract：:An emerging concept in the field of cancer biology is that a rare population of 'tumour stem cells' exists among the heterogeneous group of cells that constitute a tumour. This concept, best described with human leukaemia, indicates that stem cell function (whether normal or neoplastic) might be defined by a common se...

journal_title：Nature

authors： Lessard J,Sauvageau G

更新日期：2003-05-15 00:00:00

abstract：:The dominant forcing factors for past large-scale changes in vegetation are widely debated. Changes in the distribution of C4 plants--adapted to warm, dry conditions and low atmospheric CO2 concentrations--have been attributed to marked changes in environmental conditions, but the relative impacts of changes in aridit...

journal_title：Nature

authors： Schefuss E,Schouten S,Jansen JH,Sinninghe Damsté JS

更新日期：2003-03-27 00:00:00

abstract：: ...

journal_title：Nature

authors： Tall AR,Jelic S

更新日期：2019-02-01 00:00:00

abstract：:RNA polymerase II (RNAP II) is responsible for transcribing all messenger RNAs in eukaryotic cells during a highly regulated process that is conserved from yeast to human, and that serves as a central control point for cellular function. Here we investigate the transcription dynamics of single RNAP II molecules from S...

journal_title：Nature

authors： Galburt EA,Grill SW,Wiedmann A,Lubkowska L,Choy J,Nogales E,Kashlev M,Bustamante C

更新日期：2007-04-12 00:00:00

abstract：: ...

journal_title：Nature

authors： Gewin V

更新日期：2019-02-01 00:00:00

abstract：:So far, two genes associated with familial melanoma have been identified, accounting for a minority of genetic risk in families. Mutations in CDKN2A account for approximately 40% of familial cases, and predisposing mutations in CDK4 have been reported in a very small number of melanoma kindreds. Here we report the who...

journal_title：Nature

authors： Yokoyama S,Woods SL,Boyle GM,Aoude LG,MacGregor S,Zismann V,Gartside M,Cust AE,Haq R,Harland M,Taylor JC,Duffy DL,Holohan K,Dutton-Regester K,Palmer JM,Bonazzi V,Stark MS,Symmons J,Law MH,Schmidt C,Lanagan C,O'C

更新日期：2011-11-13 00:00:00

abstract：:The adult mammalian heart is incapable of regeneration following cardiomyocyte loss, which underpins the lasting and severe effects of cardiomyopathy. Recently, it has become clear that the mammalian heart is not a post-mitotic organ. For example, the neonatal heart is capable of regenerating lost myocardium, and the ...

journal_title：Nature

authors： Nakada Y,Canseco DC,Thet S,Abdisalaam S,Asaithamby A,Santos CX,Shah AM,Zhang H,Faber JE,Kinter MT,Szweda LI,Xing C,Hu Z,Deberardinis RJ,Schiattarella G,Hill JA,Oz O,Lu Z,Zhang CC,Kimura W,Sadek HA

更新日期：2017-01-12 00:00:00

abstract：:Inositol trisphosphate is a second messenger that controls many cellular processes by generating internal calcium signals. It operates through receptors whose molecular and physiological properties closely resemble the calcium-mobilizing ryanodine receptors of muscle. This family of intracellular calcium channels disp...

journal_title：Nature

authors： Berridge MJ

更新日期：1993-01-28 00:00:00

abstract：:Mutations in the p53 tumour-suppressor gene are the most frequently observed genetic lesions in human cancers. To investigate the role of the p53 gene in mammalian development and tumorigenesis, a null mutation was introduced into the gene by homologous recombination in murine embryonic stem cells. Mice homozygous for...

journal_title：Nature

authors： Donehower LA,Harvey M,Slagle BL,McArthur MJ,Montgomery CA Jr,Butel JS,Bradley A

更新日期：1992-03-19 00:00:00

abstract：:The plasma membrane-bound mammalian ras proteins of relative molecular mass 21,000 (ras p21) share biochemical and structural properties with other guanine nucleotide-binding regulatory proteins (G-proteins). Oncogenic ras p21 variants result from amino acid substitutions at specific positions that cause p21 to occur ...

journal_title：Nature

authors： Vogel US,Dixon RA,Schaber MD,Diehl RE,Marshall MS,Scolnick EM,Sigal IS,Gibbs JB

更新日期：1988-09-01 00:00:00

abstract：:Functional studies seem now to confirm, as first suggested by E. Geoffroy Saint-Hilaire in 1822, that there was an inversion of the dorsoventral axis during animal evolution. A conserved system of extracellular signals provides positional information for the allocation of embryonic cells to specific tissue types both ...

journal_title：Nature

authors： De Robertis EM,Sasai Y

更新日期：1996-03-07 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：:Long before infants reach, crawl or walk, they explore the world by looking: they look to learn and to engage, giving preferential attention to social stimuli, including faces, face-like stimuli and biological motion. This capacity-social visual engagement-shapes typical infant development from birth and is pathognomo...

journal_title：Nature

authors： Constantino JN,Kennon-McGill S,Weichselbaum C,Marrus N,Haider A,Glowinski AL,Gillespie S,Klaiman C,Klin A,Jones W

更新日期：2017-07-20 00:00:00