Quantum information and computation

abstract：:Within the substantia nigra, the dendrites of dopaminergic neurons that project to the striatum appear to play an active and nonclassical role in the physiology of the neuron in that they release transmitter and protein, but little is known of the factors controlling release of substances from these dendrites. In this...

journal_title：Nature

authors： Nedergaard S,Bolam JP,Greenfield SA

更新日期：1988-05-12 00:00:00

abstract：:Mutation of the XRCC4 gene in mammalian cells prevents the formation of the signal and coding joints in the V(D)J recombination reaction, which is necessary for production of a functional immunoglobulin gene, and renders the cells highly sensitive to ionizing radiation. However, XRCC4 shares no sequence homology with ...

journal_title：Nature

authors： Grawunder U,Wilm M,Wu X,Kulesza P,Wilson TE,Mann M,Lieber MR

更新日期：1997-07-31 00:00:00

abstract：:The function of the Xenopus laevis ribosomal spacer has been studied in vivo and by microinjection of in vitro mutants into Xenopus oocytes. It is shown that the spacer directs specific RNA transcripts which most probably terminate upstream of the ribosomal genes and that it is able to modulate transcription of these ...

journal_title：Nature

authors： Moss T

更新日期：1983-03-17 00:00:00

abstract：:The cartilage and skin of animals, which are made up of more than fifty per cent water, are rather stiff (having elastic moduli of up to 100 megapascals) as well as tough and hard to break (with fracture energies of up to 9,000 joules per square metre). Such features make these biological materials mechanically superi...

journal_title：Nature

authors： Rauner N,Meuris M,Zoric M,Tiller JC

更新日期：2017-03-16 00:00:00

abstract：:The TGF-beta/activin/BMP cytokine family signals through serine/threonine kinase receptors, but how the receptors transduce the signal is unknown. The Mad (Mothers against decapentaplegic) gene from Drosophila and the related Sma genes from Caenorhabditis elegans have been genetically implicated in signalling by membe...

journal_title：Nature

authors： Liu F,Hata A,Baker JC,Doody J,Cárcamo J,Harland RM,Massagué J

更新日期：1996-06-13 00:00:00

abstract：:The optics of the eye cause different wavelengths of light to be differentially focused at the retina. This phenomenon is due to longitudinal chromatic aberration, a wavelength-dependent change in refractive power. Retinal image quality may consequently vary for the different classes of cone photoreceptors, cells tune...

journal_title：Nature

authors： McLellan JS,Marcos S,Prieto PM,Burns SA

更新日期：2002-05-09 00:00:00

abstract：:Growth of basal cell carcinomas (BCCs) requires high levels of hedgehog (HH) signalling through the transcription factor GLI. Although inhibitors of membrane protein smoothened (SMO) effectively suppress HH signalling, early tumour resistance illustrates the need for additional downstream targets for therapy. Here we ...

journal_title：Nature

authors： Atwood SX,Li M,Lee A,Tang JY,Oro AE

更新日期：2013-02-28 00:00:00

abstract：:The HLA-D region of the human major histocompatibility complex (MHC) has been shown to be homologous to the murine I region in terms of both structure and function. Both regions encode class II MHC molecules which restrict T-lymphocyte interactions with antigen-presenting cells. We have recently described the MHC rest...

journal_title：Nature

authors： Eckels DD,Lake P,Lamb JR,Johnson AH,Shaw S,Woody JN,Hartzman RJ

更新日期：1983-02-24 00:00:00

abstract：:Comparative mapping, which compares the location of homologous genes in different species, is a powerful tool for studying genome evolution. Comparative maps suggest that rates of chromosomal change in mammals can vary from one to ten rearrangements per million years. On the basis of these rates we would expect 84 to ...

journal_title：Nature

authors： Burt DW,Bruley C,Dunn IC,Jones CT,Ramage A,Law AS,Morrice DR,Paton IR,Smith J,Windsor D,Sazanov A,Fries R,Waddington D

更新日期：1999-11-25 00:00:00

abstract：:The commitment of non-dividing cells (in G0) to enter division can be studied using primary cultures of lymphocytes. The cells are stable in G0 unless stimulated by mitogen such as concanavalin A (Con A). Commitment to enter the division cycle depends on the expression of gene(s) induced by Con A and the synthesis of ...

journal_title：Nature

authors： Milner J

更新日期：1984-07-12 00:00:00

abstract：:Cutaneous malignant melanoma is a highly aggressive and frequently chemoresistant cancer, the incidence of which continues to rise. Epidemiological studies show that the major aetiological melanoma risk factor is ultraviolet (UV) solar radiation, with the highest risk associated with intermittent burning doses, especi...

journal_title：Nature

authors： Zaidi MR,Davis S,Noonan FP,Graff-Cherry C,Hawley TS,Walker RL,Feigenbaum L,Fuchs E,Lyakh L,Young HA,Hornyak TJ,Arnheiter H,Trinchieri G,Meltzer PS,De Fabo EC,Merlino G

更新日期：2011-01-27 00:00:00

abstract：:The mushroom bodies in the protocerebrum are believed to be the structures of the insect brain most closely associated with higher-order sensory integration and learning. Drosophila melanogaster mutants with olfactory learning deficits have anatomically abnormal mushroom bodies or altered patterns of gene expression i...

journal_title：Nature

authors： Withers GS,Fahrbach SE,Robinson GE

更新日期：1993-07-15 00:00:00

abstract：:The axial relationship between the collagen and mineral componetns in calcified turkey leg tendon was investigated using low-angle X-ray and neutron diffraction. The results indicate that the mineral is arranged with the same axial periodicity as the collagen and occupies the gap region of the collagen structure. ...

journal_title：Nature

authors： White SW,Hulmes DJ,Miller A,Timmins PA

更新日期：1977-03-31 00:00:00

abstract：:Sex roles are typically thought of as being fixed for a given species. In most animals males compete for females, whereas the females are more reluctant to mate. Therefore sexual selection usually acts most strongly on males. This is explained by males having a higher potential reproductive rate than females, leading ...

journal_title：Nature

authors： Forsgren E,Amundsen T,Borg AA,Bjelvenmark J

更新日期：2004-06-03 00:00:00

abstract：:Secretory antibodies of the IgA class (sIgA) are thought to have an important role in the defence against bacteria at mucosal surfaces--the level at which the infectious agents first come into contact with the host. However, the mechanism by which sIgA exert their antibacterial activity is still a matter of debate. Af...

journal_title：Nature

authors： Tagliabue A,Nencioni L,Villa L,Keren DF,Lowell GH,Boraschi D

更新日期：1983-11-10 00:00:00

abstract：:Cognitive ethology focuses on the study of animals under natural conditions to reveal ecologically adapted modes of learning. But biologists can more easily study what an animal learns than how it learns. For example, honeybees take repeated 'orientation' flights before becoming foragers at about three weeks of age. T...

journal_title：Nature

authors： Capaldi EA,Smith AD,Osborne JL,Fahrbach SE,Farris SM,Reynolds DR,Edwards AS,Martin A,Robinson GE,Poppy GM,Riley JR

更新日期：2000-02-03 00:00:00

abstract：:Blood coagulation can be initiated when factor VII or VIIa, a plasma protease, binds to its essential cofactor, tissue factor (TF), and proteolytically activates factors IX and X, triggering a cascade of events which eventually leads to the formation of thrombin and a fibrin clot. Plasma contains a lipoprotein-associa...

journal_title：Nature

authors： Girard TJ,Warren LA,Novotny WF,Likert KM,Brown SG,Miletich JP,Broze GJ Jr

更新日期：1989-04-06 00:00:00

abstract：:A model catalyst is described which has properties in common with carbonic anhydrase. The model demonstrates the availability of a mechanism, previously only hypothetical, for the action of the enzyme. It also shows, however, that this mechanism alone is not adequate to produce the high activity of the enzyme. ...

journal_title：Nature

authors： Woolley P

更新日期：1975-12-25 00:00:00

abstract：:Asexual reproduction by free-living invertebrate larvae is a rare and enigmatic phenomenon and, although it is known to occur in sea stars and brittle stars, it has not been detected in other echinoderms despite more than a century of intensive study. Here we describe spontaneous larval cloning in three species from t...

journal_title：Nature

authors： Eaves AA,Palmer AR

更新日期：2003-09-11 00:00:00

abstract：:Many planktonic organisms produce 'resting' stages when the environmental conditions deteriorate. Like seeds, resting stages can survive unfavourable conditions. The crustacean Daphnia normally reproduces by means of parthenogenetically produced normal, not resting, eggs-but occasionally switches to bisexual reproduct...

journal_title：Nature

authors： Alekseev V,Lampert W

更新日期：2001-12-20 00:00:00

abstract：:During formation of the neuromuscular junction, acetylcholine receptors in the endplate membrane become metabolically stabilized under neural control, their half-life increasing from about 1 day to about 10 days. The metabolic stability of the receptors is regulated by the electrical activity induced in the muscle by ...

journal_title：Nature

authors： Rotzler S,Schramek H,Brenner HR

更新日期：1991-01-24 00:00:00

abstract：:The University of California at Berkeley has announced the postponement of a planned experiment involving the field testing of bacteria genetically engineered to reduce frost damage to crops. The action came after Jeremy Rifkin, who had earlier filed suit against the National Institutes of Health after its Recombinan...

journal_title：Nature

authors： Budiansky S

更新日期：1983-10-13 00:00:00

abstract：:Every cancer originates from a single cell. During expansion of the neoplastic cell population, individual cells acquire genetic and phenotypic differences from each other. Here, to investigate the nature and extent of intra-tumour diversification, we characterized organoids derived from multiple single cells from thr...

journal_title：Nature

authors： Roerink SF,Sasaki N,Lee-Six H,Young MD,Alexandrov LB,Behjati S,Mitchell TJ,Grossmann S,Lightfoot H,Egan DA,Pronk A,Smakman N,van Gorp J,Anderson E,Gamble SJ,Alder C,van de Wetering M,Campbell PJ,Stratton MR,Clevers

更新日期：2018-04-01 00:00:00

abstract：:The most severe excursions in the Earth's climatic history are thought to be associated with Proterozoic glaciations. According to the 'Snowball Earth' hypothesis, the Marinoan glaciation, which ended about 635 million years ago, involved global or nearly global ice cover. At the termination of this glacial period, ra...

journal_title：Nature

authors： Allen PA,Hoffman PF

更新日期：2005-01-13 00:00:00

abstract：:A congressional investigation alleges that some researchers have failed to report all the drug-company money that they have received--and that universities may have been too slow to police them. ...

journal_title：Nature

authors：

更新日期：2008-10-16 00:00:00

abstract：:Epigenetic pathways can regulate gene expression by controlling and interpreting chromatin modifications. Cancer cells are characterized by altered epigenetic landscapes, and commonly exploit the chromatin regulatory machinery to enforce oncogenic gene expression programs. Although chromatin alterations are, in princi...

journal_title：Nature

authors： Zuber J,Shi J,Wang E,Rappaport AR,Herrmann H,Sison EA,Magoon D,Qi J,Blatt K,Wunderlich M,Taylor MJ,Johns C,Chicas A,Mulloy JC,Kogan SC,Brown P,Valent P,Bradner JE,Lowe SW,Vakoc CR

更新日期：2011-08-03 00:00:00

abstract：:Butterflies rely extensively on colour vision to adapt to the natural world. Most species express a broad range of colour-sensitive Rhodopsin proteins in three types of ommatidia (unit eyes), which are distributed stochastically across the retina. The retinas of Drosophila melanogaster use just two main types, in whic...

journal_title：Nature

authors： Perry M,Kinoshita M,Saldi G,Huo L,Arikawa K,Desplan C

更新日期：2016-07-14 00:00:00

abstract：:Activation of RIPK1 controls TNF-mediated apoptosis, necroptosis and inflammatory pathways1. Cleavage of human and mouse RIPK1 after residues D324 and D325, respectively, by caspase-8 separates the RIPK1 kinase domain from the intermediate and death domains. The D325A mutation in mouse RIPK1 leads to embryonic lethali...

journal_title：Nature

authors： Tao P,Sun J,Wu Z,Wang S,Wang J,Li W,Pan H,Bai R,Zhang J,Wang Y,Lee PY,Ying W,Zhou Q,Hou J,Wang W,Sun B,Yang M,Liu D,Fang R,Han H,Yang Z,Huang X,Li H,Deuitch N,Zhang Y,Dissanayake D,Haude K,McWalter K

更新日期：2020-01-01 00:00:00

abstract：:Copy number variation (CNV) of DNA sequences is functionally significant but has yet to be fully ascertained. We have constructed a first-generation CNV map of the human genome through the study of 270 individuals from four populations with ancestry in Europe, Africa or Asia (the HapMap collection). DNA from these ind...

journal_title：Nature

authors： Redon R,Ishikawa S,Fitch KR,Feuk L,Perry GH,Andrews TD,Fiegler H,Shapero MH,Carson AR,Chen W,Cho EK,Dallaire S,Freeman JL,González JR,Gratacòs M,Huang J,Kalaitzopoulos D,Komura D,MacDonald JR,Marshall CR,Mei R,M

更新日期：2006-11-23 00:00:00

abstract：:Precipitation and atmospheric circulation are the coupled processes through which tropical ocean surface temperatures drive global weather and climate1-5. Local sea surface warming tends to increase precipitation, but this local control is difficult to disentangle from remote effects of conditions elsewhere. As an exa...

journal_title：Nature

authors： Good P,Chadwick R,Holloway CE,Kennedy J,Lowe JA,Roehrig R,Rushley SS

更新日期：2021-01-01 00:00:00