Fusion of isolated plant protoplasts.

abstract：:Mycorrhizae, the symbiotic associations of plant roots and fungal hyphae, are classic examples of mutualisms. In these ecologically important associations, the fungi derive photosynthetic sugars from their plant hosts, which in turn benefit from fungus-mediated uptake of mineral nutrients. Early views on the evolution...

journal_title：Nature

authors： Hibbett DS,Gilbert LB,Donoghue MJ

更新日期：2000-09-28 00:00:00

abstract：:The pocket domain of the retinoblastoma (Rb) tumour suppressor is central to Rb function, and is frequently inactivated by the binding of the human papilloma virus E7 oncoprotein in cervical cancer. The crystal structure of the Rb pocket bound to a nine-residue E7 peptide containing the LxCxE motif, shared by other Rb...

journal_title：Nature

authors： Lee JO,Russo AA,Pavletich NP

更新日期：1998-02-26 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：:Fluids and melts liberated from subducting oceanic crust recycle lithophile elements back into the mantle wedge, facilitate melting and ultimately lead to prolific subduction-zone arc volcanism. The nature and composition of the mobile phases generated in the subducting slab at high pressures have, however, remained l...

journal_title：Nature

authors： Kessel R,Schmidt MW,Ulmer P,Pettke T

更新日期：2005-09-29 00:00:00

abstract：:Myeloproliferative neoplasms (MPNs) are blood cancers that are characterized by the excessive production of mature myeloid cells and arise from the acquisition of somatic driver mutations in haematopoietic stem cells (HSCs). Epidemiological studies indicate a substantial heritable component of MPNs that is among the h...

journal_title：Nature

authors： Bao EL,Nandakumar SK,Liao X,Bick AG,Karjalainen J,Tabaka M,Gan OI,Havulinna AS,Kiiskinen TTJ,Lareau CA,de Lapuente Portilla AL,Li B,Emdin C,Codd V,Nelson CP,Walker CJ,Churchhouse C,de la Chapelle A,Klein DE,Nilsson

更新日期：2020-10-01 00:00:00

abstract：:Vaccines rarely provide full protection from disease. Nevertheless, partially effective (imperfect) vaccines may be used to protect both individuals and whole populations. We studied the potential impact of different types of imperfect vaccines on the evolution of pathogen virulence (induced host mortality) and the co...

journal_title：Nature

authors： Gandon S,Mackinnon MJ,Nee S,Read AF

更新日期：2001-12-13 00:00:00

abstract：:The Tharsis region is the largest volcanic complex on Mars and in the Solar System. Young lava flows cover its surface (from the Amazonian period, less than 3 billion years ago) but its growth started during the Noachian era (more than 3.7 billion years ago). Its position has induced a reorientation of the planet with...

journal_title：Nature

authors： Bouley S,Baratoux D,Matsuyama I,Forget F,Séjourné A,Turbet M,Costard F

更新日期：2016-03-17 00:00:00

abstract：:Prostaglandins have wide-ranging effects in the body and are thought to be important mediators of inflammation. Cyclooxygenase (COX) plays a key regulatory role in prostaglandin synthesis, and occurs in both constitutive (COX-1) and inducible (COX-2) isoforms. COX-1 is thought to provide cytoprotective effects, wherea...

journal_title：Nature

authors： Dinchuk JE,Car BD,Focht RJ,Johnston JJ,Jaffee BD,Covington MB,Contel NR,Eng VM,Collins RJ,Czerniak PM

更新日期：1995-11-23 00:00:00

abstract：: ...

journal_title：Nature

authors： Rivest S

更新日期：2018-11-01 00:00:00

abstract：:Levels of gene expression underpin organismal phenotypes1,2, but the nature of selection that acts on gene expression and its role in adaptive evolution remain unknown1,2. Here we assayed gene expression in rice (Oryza sativa)3, and used phenotypic selection analysis to estimate the type and strength of selection on t...

journal_title：Nature

authors： Groen SC,Ćalić I,Joly-Lopez Z,Platts AE,Choi JY,Natividad M,Dorph K,Mauck WM 3rd,Bracken B,Cabral CLU,Kumar A,Torres RO,Satija R,Vergara G,Henry A,Franks SJ,Purugganan MD

更新日期：2020-02-01 00:00:00

abstract：:A 7-A resolution map of the purple membrane has been obtained by electron microscopy of tilted, unstained specimens. The protein in the membrane contains seven, closely packed, alpha-helical segments which extend roughly perpendicular to the plane of the membrane for most of its width. Lipid bilayer regions fill the s...

journal_title：Nature

authors： Henderson R,Unwin PN

更新日期：1975-09-04 00:00:00

abstract：:Bacterial adhesion pili are designed to bind specifically and maintain attachment of bacteria to target cells. Uropathogenic P-pili are sufficiently mechanically resilient to resist the cleansing action of urine flow that removes most other bacteria. P-pili are 68 A in diameter and approximately 1 micron long, and are...

journal_title：Nature

authors： Bullitt E,Makowski L

更新日期：1995-01-12 00:00:00

abstract：:Prized for their ability to rapidly generate chemical complexity by building new ring systems and stereocentres1, cycloaddition reactions have featured in numerous total syntheses2 and are a key component in the education of chemistry students3. Similarly, carbon-carbon (C-C) cross-coupling methods are integral to syn...

journal_title：Nature

authors： Chen TG,Barton LM,Lin Y,Tsien J,Kossler D,Bastida I,Asai S,Bi C,Chen JS,Shan M,Fang H,Fang FG,Choi HW,Hawkins L,Qin T,Baran PS

更新日期：2018-08-01 00:00:00

abstract：:To communicate, spacecraft and satellites rely on microwave devices, which at present are based on relatively inefficient thermionic electron sources that require heating and cannot be switched on instantaneously. Here we describe a microwave diode that uses a cold-cathode electron source consisting of carbon nanotube...

journal_title：Nature

authors： Teo KB,Minoux E,Hudanski L,Peauger F,Schnell JP,Gangloff L,Legagneux P,Dieumegard D,Amaratunga GA,Milne WI

更新日期：2005-10-13 00:00:00

abstract：:Amyloid beta-protein (AP) is a peptide of relative molecular mass (Mr) 42,000 found in the senile plaques, cerebrovascular amyloid deposits, and neurofibrillary tangles of patients with Alzheimer's disease and Down's syndrome (trisomy 21). Recent molecular genetic evidence has indicated that AP is encoded as part of a...

journal_title：Nature

authors： Tanzi RE,St George-Hyslop PH,Haines JL,Polinsky RJ,Nee L,Foncin JF,Neve RL,McClatchey AI,Conneally PM,Gusella JF

更新日期：1987-09-10 00:00:00

abstract：:In their investigation into whether female mate-choice drives male dispersal, Höner et al. argue that female spotted hyaenas (Crocuta crocuta) prefer mates whose tenure in the social group is less than the females' age, to avoid paternal incest, and suggest that male dispersal reflects this preference. However, we are...

journal_title：Nature

authors： Van Horn RC,Watts HE,Holekamp KE

更新日期：2008-07-10 00:00:00

abstract：:Many-body systems in nature exhibit complexity and self-organization arising from seemingly simple laws. For example, the long-range Coulomb interaction between electrical charges has a simple form, yet is responsible for a plethora of bound states in matter, ranging from the hydrogen atom to complex biochemical struc...

journal_title：Nature

authors： Kaindl RA,Carnahan MA,Hägele D,Lövenich R,Chemla DS

更新日期：2003-06-12 00:00:00

abstract：:Interleukin (IL)-17-producing T helper cells (T(H)17) are a recently identified CD4(+) T cell subset distinct from T helper type 1 (T(H)1) and T helper type 2 (T(H)2) cells. T(H)17 cells can drive antigen-specific autoimmune diseases and are considered the main population of pathogenic T cells driving experimental aut...

journal_title：Nature

authors： Esplugues E,Huber S,Gagliani N,Hauser AE,Town T,Wan YY,O'Connor W Jr,Rongvaux A,Van Rooijen N,Haberman AM,Iwakura Y,Kuchroo VK,Kolls JK,Bluestone JA,Herold KC,Flavell RA

更新日期：2011-07-17 00:00:00

abstract：:The genome of Aspergillus oryzae, a fungus important for the production of traditional fermented foods and beverages in Japan, has been sequenced. The ability to secrete large amounts of proteins and the development of a transformation system have facilitated the use of A. oryzae in modern biotechnology. Although both...

journal_title：Nature

authors： Machida M,Asai K,Sano M,Tanaka T,Kumagai T,Terai G,Kusumoto K,Arima T,Akita O,Kashiwagi Y,Abe K,Gomi K,Horiuchi H,Kitamoto K,Kobayashi T,Takeuchi M,Denning DW,Galagan JE,Nierman WC,Yu J,Archer DB,Bennett JW,Bh

更新日期：2005-12-22 00:00:00

abstract：:Structural fluctuations in proteins on the picosecond timescale have been studied in considerable detail by theoretical methods such as molecular dynamics simulation, but there exist very few experimental data with which to test the conclusions. We have used the technique of inelastic neutron scattering to investigate...

journal_title：Nature

authors： Doster W,Cusack S,Petry W

更新日期：1989-02-23 00:00:00

abstract：:Accurate measurement of the lifetime of the neutron (which is unstable to beta decay) is important for understanding the weak nuclear force and the creation of matter during the Big Bang. Previous measurements of the neutron lifetime have mainly been limited by certain systematic errors; however, these could in princi...

journal_title：Nature

authors： Huffman PR,Brome CR,Butterworth JS,Coakley KJ,Dewey MS,Dzhosyuk SN,Golub R,Greene GL,Habicht K,Lamoreaux SK,Mattoni CE,McKinsey DN,Wietfeldt FE,Doyle JM

更新日期：2000-01-06 00:00:00

abstract：:Separation of eukaryotic sister chromatids during the cell cycle is timed by the spindle assembly checkpoint (SAC) and ultimately triggered when separase cleaves cohesion-mediating cohesin1-3. Silencing of the SAC during metaphase activates the ubiquitin ligase APC/C (anaphase-promoting complex, also known as the cycl...

journal_title：Nature

authors： Hellmuth S,Gómez-H L,Pendás AM,Stemmann O

更新日期：2020-04-01 00:00:00

abstract：:Cryo-electron microscopy (cryo-EM) has the capacity to capture molecular machines in action1-3. ATP-binding cassette (ABC) exporters are highly dynamic membrane proteins that extrude a wide range of substances from the cytosol4-6 and thereby contribute to essential cellular processes, adaptive immunity and multidrug r...

journal_title：Nature

authors： Hofmann S,Januliene D,Mehdipour AR,Thomas C,Stefan E,Brüchert S,Kuhn BT,Geertsma ER,Hummer G,Tampé R,Moeller A

更新日期：2019-07-01 00:00:00

abstract：:Diffuse gliomas are the most common malignant brain tumours in adults and include glioblastomas and World Health Organization (WHO) grade II and grade III tumours (sometimes referred to as lower-grade gliomas). Genetic tumour profiling is used to classify disease and guide therapy1,2, but involves brain surgery for ti...

journal_title：Nature

authors： Miller AM,Shah RH,Pentsova EI,Pourmaleki M,Briggs S,Distefano N,Zheng Y,Skakodub A,Mehta SA,Campos C,Hsieh WY,Selcuklu SD,Ling L,Meng F,Jing X,Samoila A,Bale TA,Tsui DWY,Grommes C,Viale A,Souweidane MM,Tabar V,

更新日期：2019-01-01 00:00:00

abstract：:Applications are emerging that require the creation of fine-scale structures in three dimensions--examples include scaffolds for tissue engineering, micro-fluidic devices and photonic materials that control light propagation over a range of frequencies. But writing methods such as dip-pen nanolithography and ink-jet p...

journal_title：Nature

authors： Gratson GM,Xu M,Lewis JA

更新日期：2004-03-25 00:00:00

abstract：:Human fibroblast cells produce beta-type interferon only in response to viral infection or treatment with an inducer such as poly(rI) X poly(rC); this event is most probably controlled at the transcriptional level (for review see ref. 1). To study the induction process, we inserted the human fibroblast interferon (IFN...

journal_title：Nature

authors： Tavernier J,Gheysen D,Duerinck F,Van der Heyden J,Fiers W

更新日期：1983-02-17 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：:Theories of the origin of optical asymmetry in living systems place fundamental importance on the amplification of optical asymmetry by an autocatalytic process. The replication of a polynucleotide is one obvious choice for such an autocatalytic growth mechanism. If an optically homogeneous polynucleotide could replic...

journal_title：Nature

authors： Joyce GF,Visser GM,van Boeckel CA,van Boom JH,Orgel LE,van Westrenen J

更新日期：1984-08-16 00:00:00

abstract：:Particle acceleration based on high intensity laser systems (a process known as laser-plasma acceleration) has achieved high quality particle beams that compare favourably with conventional acceleration techniques in terms of emittance, brightness and pulse duration. A long-term difficulty associated with laser-plasma...

journal_title：Nature

authors： Schwoerer H,Pfotenhauer S,Jäckel O,Amthor KU,Liesfeld B,Ziegler W,Sauerbrey R,Ledingham KW,Esirkepov T

更新日期：2006-01-26 00:00:00

abstract：:T-cell factor (TCF), a high-mobility-group domain protein, is the transcription factor activated by Wnt/Wingless signalling. When signalling occurs, TCF binds to its coactivator, beta-catenin/Armadillo, and stimulates the transcription of the target genes of Wnt/Wingless by binding to TCF-responsive enhancers. Inappro...

journal_title：Nature

authors： Waltzer L,Bienz M

更新日期：1998-10-01 00:00:00