A disintegrating minor planet transiting a white dwarf.

abstract：:The interplay of evolution and development has been at the heart of evolutionary theory for more than a century. Heterochrony—change in the timing or rate of developmental events—has been implicated in the evolution of major vertebrate lineages such as mammals, including humans. Birds are the most speciose land verteb...

journal_title：Nature

authors： Bhullar BA,Marugán-Lobón J,Racimo F,Bever GS,Rowe TB,Norell MA,Abzhanov A

更新日期：2012-07-12 00:00:00

abstract：:Diminishing fossil fuel reserves and growing concerns about global warming indicate that sustainable sources of energy are needed in the near future. For fuels to be useful in the transportation sector, they must have specific physical properties that allow for efficient distribution, storage and combustion; these pro...

journal_title：Nature

authors： Román-Leshkov Y,Barrett CJ,Liu ZY,Dumesic JA

更新日期：2007-06-21 00:00:00

abstract：:Novel capsomeric complexes, pentamers and hexamers were detected as chemical entities in phage Q beta. Both were composed of identical protein subunits and stabilized by intermolecular disulphide bonds. Their numbers per particle were about 12 for pentamers and about 20 for hexamers--consistent with theoretical expect...

journal_title：Nature

authors： Takamatsu H,Iso K

更新日期：1982-08-26 00:00:00

abstract：:The primary action of a family of mitogens including bombesin, bradykinin, vasopressin and alpha-thrombin is to activate the hydrolysis of polyphosphoinositides. Hydrolysis of phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) by phospholipase C is mediated through coupling of surface receptors to a GTP-binding pro...

journal_title：Nature

authors： Chambard JC,Paris S,L'Allemain G,Pouysségur J

更新日期：1987-04-23 00:00:00

abstract：:During the past ten years, coupled quantum wells have emerged as a promising system for experiments on Bose condensation of excitons, with numerous theoretical and experimental studies aimed at the demonstration of this effect. One of the issues driving these studies is the possibility of long-range coherent transport...

journal_title：Nature

authors： Snoke D,Denev S,Liu Y,Pfeiffer L,West K

更新日期：2002-08-15 00:00:00

abstract：:Pro-inflammatory cytokines activate the transcription factor NF-kappaB by stimulating the activity of a protein kinase that phosphorylates IkappaB, an inhibitor of NF-kappaB, at sites that trigger its ubiquitination and degradation. This results in the nuclear translocation of freed NF-kappaB dimers and the activation...

journal_title：Nature

authors： Rothwarf DM,Zandi E,Natoli G,Karin M

更新日期：1998-09-17 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：:The discovery of intervening sequences (introns) in DNA led Gilbert and Tonegawa to suggest that a new protein could have been produced by bringing together certain segments of pre-existing ones. However, Blake argued that if DNA was so organized that coding sequences (exons) correspond to structural as well as functi...

journal_title：Nature

authors： Go M

更新日期：1981-05-07 00:00:00

abstract：:The overexpression of defined transcription factors in somatic cells results in their reprogramming into induced pluripotent stem (iPS) cells. The extremely low efficiency and slow kinetics of in vitro reprogramming suggest that further rare events are required to generate iPS cells. The nature and identity of these e...

journal_title：Nature

authors： Utikal J,Polo JM,Stadtfeld M,Maherali N,Kulalert W,Walsh RM,Khalil A,Rheinwald JG,Hochedlinger K

更新日期：2009-08-27 00:00:00

abstract：:As key executers of biological functions, the activity and abundance of proteins are subjected to extensive regulation. Deciphering the genetic architecture underlying this regulation is critical for understanding cellular signalling events and responses to environmental cues. Using random mutagenesis in haploid human...

journal_title：Nature

authors： Brockmann M,Blomen VA,Nieuwenhuis J,Stickel E,Raaben M,Bleijerveld OB,Altelaar AFM,Jae LT,Brummelkamp TR

更新日期：2017-06-08 00:00:00

abstract：:Neuropeptide Y (NPY) has a number of functions in mammalian physiology. Here we identify a role for NPY in promoting proliferation of postnatal neuronal precursor cells. NPY is synthesized in the postnatal olfactory epithelium by sustentacular cells, previously proposed to function only in structural support. Mice wit...

journal_title：Nature

authors： Hansel DE,Eipper BA,Ronnett GV

更新日期：2001-04-19 00:00:00

abstract：:Long-term reconstitution of the lymphohaematopoietic cells of a mouse after lethal irradiation requires the transplantation of at least (5-10) x 10(3) bone marrow cells. Several cell-separation techniques based on cell-surface characteristics have been used in attempts to identify the pluripotent haematopoietic stem c...

journal_title：Nature

authors： Jones RJ,Wagner JE,Celano P,Zicha MS,Sharkis SJ

更新日期：1990-09-13 00:00:00

abstract：:Red colobus are one of a small number of primate species in which females have been reported to transfer between breeding groups more commonly than males. Several authors have hypothesised that in such species transference may serve to reduce the risk to females of producing offspring of lower fitness through inbreedi...

journal_title：Nature

authors： Marsh CW

更新日期：1979-10-18 00:00:00

abstract：:The spectral content of skin vibrations, produced by either displacing the finger across a surface texture1 or passively sensing external movements through the solid substrate2,3, provides fundamental information about our environment. Low-frequency flutter (below 50 Hz) applied locally to the primate fingertip evokes...

journal_title：Nature

authors： Prsa M,Morandell K,Cuenu G,Huber D

更新日期：2019-03-01 00:00:00

abstract：:Government policies currently commit us to surface warming of three to four degrees Celsius above pre-industrial levels by 2100, which will lead to enhanced ice-sheet melt. Ice-sheet discharge was not explicitly included in Coupled Model Intercomparison Project phase 5, so effects on climate from this melt are not cur...

journal_title：Nature

authors： Golledge NR,Keller ED,Gomez N,Naughten KA,Bernales J,Trusel LD,Edwards TL

更新日期：2019-02-01 00:00:00

abstract：:p60src, the transforming protein of Rous sarcoma virus (RSV), is a protein kinase that has a strict specificity for tyrosine. The phosphorylation of cellular proteins by p60src (ref. 4) results in transformation. Recently, Barker and Dayhoff discovered that residues 259-485 of p60src have 22% sequence identity with re...

journal_title：Nature

authors： Kamps MP,Taylor SS,Sefton BM

更新日期：1984-08-16 00:00:00

abstract：:The exceptionally broad species diversity of vascular plant genera in east Asian temperate forests, compared with their sister taxa in North America, has been attributed to the greater climatic diversity of east Asia, combined with opportunities for allopatric speciation afforded by repeated fragmentation and coalesce...

journal_title：Nature

authors： Harrison SP,Yu G,Takahara H,Prentice IC

更新日期：2001-09-13 00:00:00

abstract：:Nutrients, such as amino acids and glucose, signal through the Rag GTPases to activate mTORC1. The GATOR1 protein complex-comprising DEPDC5, NPRL2 and NPRL3-regulates the Rag GTPases as a GTPase-activating protein (GAP) for RAGA; loss of GATOR1 desensitizes mTORC1 signalling to nutrient starvation. GATOR1 components h...

journal_title：Nature

authors： Shen K,Huang RK,Brignole EJ,Condon KJ,Valenstein ML,Chantranupong L,Bomaliyamu A,Choe A,Hong C,Yu Z,Sabatini DM

更新日期：2018-04-05 00:00:00

abstract：:First-order difference equations arise in many contexts in the biological, economic and social sciences. Such equations, even though simple and deterministic, can exhibit a surprising array of dynamical behaviour, from stable points, to a bifurcating hiearchy of stable cycles, to apparently random fluctuations. There ...

journal_title：Nature

authors： May RM

更新日期：1976-06-10 00:00:00

abstract：:Apoptosis in the immune system is a fundamental process regulating lymphocyte maturation, receptor repertoire selection and homeostasis. Thus, death by apoptosis is as essential for the function of lymphocytes as growth and differentiation. This article focuses on death receptor-associated apoptosis and the role of CD...

journal_title：Nature

authors： Krammer PH

更新日期：2000-10-12 00:00:00

abstract：:The thymus is the major, if not the sole site of maturation of T lymphocytes from their haematopoietic precursors. During embryonic life (at a few well-defined intervals, at least in birds) the thymus receives thymus-homing haematopoietic precursors that give rise to antigen-specific functional T lymphocytes. Although...

journal_title：Nature

authors： Ezine S,Weissman IL,Rouse RV

更新日期：1984-06-14 00:00:00

abstract：:In standard fluid dynamics, the density change associated with flow is often assumed to be negligible, implying that the fluid is incompressible. For example, this has been established for simple shear flows, where no pressure change is associated with flow: there is no volume deformation due to viscous stress and ine...

journal_title：Nature

authors： Furukawa A,Tanaka H

更新日期：2006-09-28 00:00:00

abstract：:The genes torso (tor) and torso-like (tsl) are two of the Drosophila maternal group genes implicated in a receptor tyrosine kinase signalling pathway that specifies terminal cell fate (reviewed in ref. 3). Loss-of-function mutations in these loci cause an identical phenotype in which pattern elements from the anterior...

journal_title：Nature

authors： Martin JR,Raibaud A,Ollo R

更新日期：1994-02-24 00:00:00

abstract：:Biological dinitrogen fixation provides the largest input of nitrogen to the oceans, therefore exerting important control on the ocean's nitrogen inventory and primary productivity. Nitrogen-isotope data from ocean sediments suggest that the marine-nitrogen inventory has been balanced for the past 3,000 years (ref. 4)...

journal_title：Nature

authors： Großkopf T,Mohr W,Baustian T,Schunck H,Gill D,Kuypers MM,Lavik G,Schmitz RA,Wallace DW,LaRoche J

更新日期：2012-08-16 00:00:00

abstract：:Ubiquitin (Ub) has important roles in a wide range of intracellular signalling pathways. In the conventional view, ubiquitin alters the signalling activity of the target protein through covalent modification, but accumulating evidence points to the emerging role of non-covalent interaction between ubiquitin and the ta...

journal_title：Nature

authors： Peisley A,Wu B,Xu H,Chen ZJ,Hur S

更新日期：2014-05-01 00:00:00

abstract：:The formation of a primordial crust is a critical step in the evolution of terrestrial planets but the timing of this process is poorly understood. The mineral zircon is a powerful tool for constraining crust formation because it can be accurately dated with the uranium-to-lead (U-Pb) isotopic decay system and is resi...

journal_title：Nature

authors： Bouvier LC,Costa MM,Connelly JN,Jensen NK,Wielandt D,Storey M,Nemchin AA,Whitehouse MJ,Snape JF,Bellucci JJ,Moynier F,Agranier A,Gueguen B,Schönbächler M,Bizzarro M

更新日期：2018-06-01 00:00:00

abstract：:Aluminium adjuvants, typically referred to as 'alum', are the most commonly used adjuvants in human and animal vaccines worldwide, yet the mechanism underlying the stimulation of the immune system by alum remains unknown. Toll-like receptors are critical in sensing infections and are therefore common targets of variou...

journal_title：Nature

authors： Eisenbarth SC,Colegio OR,O'Connor W,Sutterwala FS,Flavell RA

更新日期：2008-06-19 00:00:00

abstract：:For plants, the sensing of light in the environment is as important as vision is for animals. Fluctuations in light can be crucial to competition and survival. One way plants sense light is through the phytochromes, a small family of diverse photochromic protein photoreceptors whose origins have been traced to the pho...

journal_title：Nature

authors： Smith H

更新日期：2000-10-05 00:00:00

abstract：:The transcription factor NF-kappaB is composed of homodimeric and heterodimeric complexes of Rel/NF-kappaB-family polypeptides, which include Rel-A, c-Rel, Rel-B, NF-kappaB/p50 and NF-kappaB2/p52 . The NF-kappaB1 gene encodes a larger precursor protein, p105, from which p50 is produced constitutively by proteasome-med...

journal_title：Nature

authors： Belich MP,Salmerón A,Johnston LH,Ley SC

更新日期：1999-01-28 00:00:00

abstract：:Haploids and double haploids are important resources for studying recessive traits and have large impacts on crop breeding, but natural haploids are rare in animals. Mammalian haploids are restricted to germline cells and are occasionally found in tumours with massive chromosome loss. Recent success in establishing ha...

journal_title：Nature

authors： Li W,Shuai L,Wan H,Dong M,Wang M,Sang L,Feng C,Luo GZ,Li T,Li X,Wang L,Zheng QY,Sheng C,Wu HJ,Liu Z,Liu L,Wang L,Wang XJ,Zhao XY,Zhou Q

更新日期：2012-10-18 00:00:00