Transformation and diversification in early mammal evolution.

abstract：:Until now, photovoltaics--the conversion of sunlight to electrical power--has been dominated by solid-state junction devices, often made of silicon. But this dominance is now being challenged by the emergence of a new generation of photovoltaic cells, based, for example, on nanocrystalline materials and conducting pol...

journal_title：Nature

authors： Grätzel M

更新日期：2001-11-15 00:00:00

abstract：:A steady electric field of 30 mV across a single embryonic muscle cell produces accumulation of acetylcholine receptors toward one pole of the cell within 1 h. The movement is electrophoretic in nature and the accumulation results in the formation of stable, metabolically independent receptor aggregates. ...

journal_title：Nature

authors： Orida N,Poo MM

更新日期：1978-09-07 00:00:00

abstract：:For hundreds of years, scientists have tracked the changing appearance of Mars, first by hand drawings and later by photographs. Because of this historical record, many classical albedo patterns have long been known to shift in appearance over time. Decadal variations of the martian surface albedo are generally attrib...

journal_title：Nature

authors： Fenton LK,Geissler PE,Haberle RM

更新日期：2007-04-05 00:00:00

abstract：:The origin of eukaryotes stands as a major conundrum in biology. Current evidence indicates that the last eukaryotic common ancestor already possessed many eukaryotic hallmarks, including a complex subcellular organization. In addition, the lack of evolutionary intermediates challenges the elucidation of the relative ...

journal_title：Nature

authors： Pittis AA,Gabaldón T

更新日期：2016-03-03 00:00:00

abstract：:Antisense oligodeoxynucleotides (ODNs) have great promise as agents for the specific manipulation of gene expression. Until recently, nonspecific effects of ODNs often confounded the interpretation of antisense studies. Improvements in ODN chemistry and cellular delivery techniques now allow for more potent and specif...

journal_title：Nature

authors： Wagner RW

更新日期：1994-11-24 00:00:00

abstract：:Substrates of the proteasome are recognized and unfolded by the regulatory particle, and then translocated into the core particle (CP) to be degraded. A hetero-hexameric ATPase ring, containing subunits Rpt1-6, is situated within the base subassembly of the regulatory particle. The ATPase ring sits atop the CP, with t...

journal_title：Nature

authors： Park S,Roelofs J,Kim W,Robert J,Schmidt M,Gygi SP,Finley D

更新日期：2009-06-11 00:00:00

abstract：:Transient receptor potential (TRP) channels are sensors for a wide range of cellular and environmental signals, but elucidating how these channels respond to physical and chemical stimuli has been hampered by a lack of detailed structural information. Here we exploit advances in electron cryo-microscopy to determine t...

journal_title：Nature

authors： Liao M,Cao E,Julius D,Cheng Y

更新日期：2013-12-05 00:00:00

abstract：:Membrane remodelling plays an important role in cellular tasks such as endocytosis, vesiculation and protein sorting, and in the biogenesis of organelles such as the endoplasmic reticulum or the Golgi apparatus. It is well established that the remodelling process is aided by specialized proteins that can sense as well...

journal_title：Nature

authors： Reynwar BJ,Illya G,Harmandaris VA,Müller MM,Kremer K,Deserno M

更新日期：2007-05-24 00:00:00

abstract：:Inclusive fitness theory predicts that organisms can often increase their fitness by helping relatives. Indeed, many animals modify their behaviour towards kin in a fashion consistent with theory. Morphogenesis may also be sensitive to kinship environment, especially in species that facultatively produce distinct morp...

journal_title：Nature

authors： Pfennig DW,Collins JP

更新日期：1993-04-29 00:00:00

abstract：:Class-V myosin proceeds along actin filaments with large ( approximately 36 nm) steps. Myosin-V has two heads, each of which consists of a motor domain and a long (23 nm) neck domain. In accordance with the widely accepted lever-arm model, it was suggested that myosin-V steps to successive (36 nm) target zones along t...

journal_title：Nature

authors： Tanaka H,Homma K,Iwane AH,Katayama E,Ikebe R,Saito J,Yanagida T,Ikebe M

更新日期：2002-01-10 00:00:00

abstract：:Acyclovir (9-[2-hydroxyethoxymethyl]guanine or ACV) is a nucleoside analogue with considerable potential for the treatment of herpes simplex virus (HSV) infections in man. Two virus-coded enzymes are important in the mechanism of action of this drug: thymidine kinase (TK) which initiates its activation by converting i...

journal_title：Nature

authors： Darby G,Field HJ,Salisbury SA

更新日期：1981-01-01 00:00:00

abstract：:Supramolecular soft crystals are periodic structures that are formed by the hierarchical assembly of complex constituents, and occur in a broad variety of 'soft-matter' systems1. Such soft crystals exhibit many of the basic features (such as three-dimensional lattices and space groups) and properties (such as band str...

journal_title：Nature

authors： Feng X,Burke CJ,Zhuo M,Guo H,Yang K,Reddy A,Prasad I,Ho RM,Avgeropoulos A,Grason GM,Thomas EL

更新日期：2019-11-01 00:00:00

abstract：:One simple, widely accepted mechanism for generating an aberrant chromosome number, or aneuploidy, is through nondisjunction--a chromosome distribution error that occurs during mitosis when both copies of a duplicated chromosome are deposited into one daughter cell and none into the other. Shi and King challenge this ...

journal_title：Nature

authors： Weaver BA,Silk AD,Cleveland DW

更新日期：2006-08-17 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：:A DNA probe from a human Y chromosome-derived cosmid detects a single-copy genomic DNA fragment which can appear in different allelic forms shared by both sex chromosomes. Variants at this DNA locus show an autosomal pattern of inheritance, undergo recombination with sexual phenotype and can therefore be described as ...

journal_title：Nature

authors： Simmler MC,Rouyer F,Vergnaud G,Nyström-Lahti M,Ngo KY,de la Chapelle A,Weissenbach J

更新日期：1985-10-24 00:00:00

abstract：:The distribution of fitness effects of protein mutations is still unknown. Of particular interest is whether accumulating deleterious mutations interact, and how the resulting epistatic effects shape the protein's fitness landscape. Here we apply a model system in which bacterial fitness correlates with the enzymatic ...

journal_title：Nature

authors： Bershtein S,Segal M,Bekerman R,Tokuriki N,Tawfik DS

更新日期：2006-12-14 00:00:00

abstract：:The mechanical environment crucially influences many cell functions. However, it remains largely mysterious how mechanical stimuli are transmitted into biochemical signals. Src is known to regulate the integrin-cytoskeleton interaction, which is essential for the transduction of mechanical stimuli. Using fluorescent r...

journal_title：Nature

authors： Wang Y,Botvinick EL,Zhao Y,Berns MW,Usami S,Tsien RY,Chien S

更新日期：2005-04-21 00:00:00

abstract：:A CENTRAL assumption about long-term potentiation in the hippocampus is that the two classes of glutamate-receptor ion channel, the N-methyl-D-aspartate (NMDA) and the kainate/quisqualate (non-NMDA) subtypes, are co-localized at individual excitatory synapses. This assumption is important because of the perceived inte...

journal_title：Nature

authors： Bekkers JM,Stevens CF

更新日期：1989-09-21 00:00:00

abstract：:The spider mite Tetranychus urticae is a cosmopolitan agricultural pest with an extensive host plant range and an extreme record of pesticide resistance. Here we present the completely sequenced and annotated spider mite genome, representing the first complete chelicerate genome. At 90 megabases T. urticae has the sma...

journal_title：Nature

authors： Grbić M,Van Leeuwen T,Clark RM,Rombauts S,Rouzé P,Grbić V,Osborne EJ,Dermauw W,Ngoc PC,Ortego F,Hernández-Crespo P,Diaz I,Martinez M,Navajas M,Sucena É,Magalhães S,Nagy L,Pace RM,Djuranović S,Smagghe G,Iga M,Chr

更新日期：2011-11-23 00:00:00

abstract：:Temperature is a key factor in controlling the distribution of marine organisms and is particularly important at hydrothermal vents, where steep thermal gradients are present over a scale of centimetres. The thermophilic worm Alvinella pompejana, which is found at the vents of the East Pacific Rise (2,500-m depth), ha...

journal_title：Nature

authors： Pradillon F,Shillito B,Young CM,Gaill F

更新日期：2001-10-18 00:00:00

abstract：:A search for general regulators of cancer metastasis has yielded a set of microRNAs for which expression is specifically lost as human breast cancer cells develop metastatic potential. Here we show that restoring the expression of these microRNAs in malignant cells suppresses lung and bone metastasis by human cancer c...

journal_title：Nature

authors： Tavazoie SF,Alarcón C,Oskarsson T,Padua D,Wang Q,Bos PD,Gerald WL,Massagué J

更新日期：2008-01-10 00:00:00

abstract：:The shape of the human erythrocyte depends on intracellular ATP content and echinocytic erythrocyte ghosts obtained in the presence of Mg-ATP acquire a diskocytic shape after incubation at 37 degrees C; however, agreement is lacking about the molecular basis of the shape changes. The suggestion that phosphorylation of...

journal_title：Nature

authors： Jinbu Y,Sato S,Nakao M

更新日期：1984-01-26 00:00:00

abstract：:An increasing body of evidence points to mitochondrial dysfunction as a contributor to the molecular pathogenesis of neurodegenerative diseases such as Parkinson's disease. Recent studies of the Parkinson's disease associated genes PINK1 (ref. 2) and parkin (PARK2, ref. 3) indicate that they may act in a quality contr...

journal_title：Nature

authors： Hasson SA,Kane LA,Yamano K,Huang CH,Sliter DA,Buehler E,Wang C,Heman-Ackah SM,Hessa T,Guha R,Martin SE,Youle RJ

更新日期：2013-12-12 00:00:00

abstract：:Chronic administration of several chemical carcinogens to laboratory animals induces a variety of tumours which arise from specific cell populations within the liver. In the rat, diethylnitrosamine induces hepatocellular carcinomas, dimethylnitrosamine induces both angiosarcomas and hepatocellular carcinomas, vinyl ch...

journal_title：Nature

authors： Lewis JG,Swenberg JA

更新日期：1980-11-13 00:00:00

abstract：:Deuterostomes are a remarkably diverse super-phylum, including not only the chordates (to which we belong) but groups as disparate as the echinoderms and the hemichordates. The phylogeny of deuterostomes is now achieving some degree of stability, especially on account of new molecular data, but this leaves as conjectu...

journal_title：Nature

authors： Shu DG,Morris SC,Han J,Zhang ZF,Liu JN

更新日期：2004-07-22 00:00:00

abstract：:Five new double-mutant haemoglobins composed of betaS chains and alpha chains with different substitutions, which are located at the surface of the tetramer, have been prepared. Although all the hybrids are more soluble than deoxyhaemoglobin S, the individual differences between these molecules make it possible to eva...

journal_title：Nature

authors： Benesch RE,Yung S,Benesch R,Mack J,Schneider RG

更新日期：1976-03-18 00:00:00

abstract：:Current human immunodeficiency virus-1 (HIV-1) vaccines elicit strain-specific neutralizing antibodies. However, cross-reactive neutralizing antibodies arise in approximately 20% of HIV-1-infected individuals, and details of their generation could provide a blueprint for effective vaccination. Here we report the isola...

journal_title：Nature

authors： Liao HX,Lynch R,Zhou T,Gao F,Alam SM,Boyd SD,Fire AZ,Roskin KM,Schramm CA,Zhang Z,Zhu J,Shapiro L,NISC Comparative Sequencing Program.,Mullikin JC,Gnanakaran S,Hraber P,Wiehe K,Kelsoe G,Yang G,Xia SM,Montefiori DC

更新日期：2013-04-25 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：:The well known trade-off between hardness and toughness (resistance to fracture) makes simultaneous improvement of both properties challenging, especially in diamond. The hardness of diamond can be increased through nanostructuring strategies1,2, among which the formation of high-density nanoscale twins - crystalline ...

journal_title：Nature

authors： Yue Y,Gao Y,Hu W,Xu B,Wang J,Zhang X,Zhang Q,Wang Y,Ge B,Yang Z,Li Z,Ying P,Liu X,Yu D,Wei B,Wang Z,Zhou XF,Guo L,Tian Y

更新日期：2020-06-01 00:00:00

abstract：: ...

journal_title：Nature

authors： Maitra A

更新日期：2019-03-01 00:00:00