Facilitating hydrogen atom migration via a dense phase on palladium islands to a surrounding silver surface.

abstract：:The chloroplast coupling factor 1 consists of five nonidentical subunits, three of which (alpha, beta, and epsilon subunits) have been shown in several laboratories to be synthesized within chloroplasts. The site of synthesis of the remaining two (gamma and delta subunits) was investigated by analyzing products direct...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Watanabe A,Price CA

更新日期：1982-10-01 00:00:00

abstract：:Peripheral blood leukocytes, obtained from volunteers after vaccination or natural illness with influenza, were assayed for cytotoxicity against influenza virus-infected cells. Approximately 7 days after vaccination or the onset of respiratory illness, peak cytotoxicity was demonstrated in a chromium-release assay. Se...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Greenberg SB,Six HR,Drake S,Couch RB

更新日期：1979-09-01 00:00:00

abstract：:Mutator activity associated with the common male recombination (MR) chromosomes in Drosophila melanogaster appears to be suppressed in natural populations. Crosses between geographically separated populations, however, lead to the release of mutator activity as measured by a significant increase in visible mutations. ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Thompson JN Jr,Woodruff RC

更新日期：1980-02-01 00:00:00

abstract：:Plants can sense the direction of gravity and change the growth orientation of their organs. The molecular mechanisms of gravity sensing and signal transduction during gravitropism are not well known. We have isolated several shoot gravitropism (sgr) mutants of Arabidopsis. The sgr3-1 mutant exhibits a reduced gravitr...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Yano D,Sato M,Saito C,Sato MH,Morita MT,Tasaka M

更新日期：2003-07-08 00:00:00

abstract：:The proteasome is responsible for degradation of substrates of the ubiquitin pathway. 20S proteasomes are cylindrical particles with subunits arranged in a stack of four heptameric rings. The outer rings are composed of alpha subunits, and the inner rings are composed of beta subunits. A well-characterized archaeal pr...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Arendt CS,Hochstrasser M

更新日期：1997-07-08 00:00:00

abstract：:Horizontal cells of the carp retina possess dopamine receptors linked to adenylate cyclase. Isolated, intact horizontal cells respond to micromolar concentrations of dopamine, whereas nanomolar concentrations of haloperidol, (+)-butaclamol, and flupenthixol block the dopamine response. Preincubation in Ringer's soluti...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Van Buskirk R,Dowling JE

更新日期：1982-05-01 00:00:00

abstract：:Analysis of commercial catches reveals a serial depletion of some oceanic fish stocks over time, resulting in fisheries focusing on increasingly smaller species closer to the base of the food chain. This effect, described as fishing down the marine food web, is observed when the trophic level of the catch declines ove...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Dunlop ES,Goto D,Jackson DA

更新日期：2019-10-01 00:00:00

abstract：:Interaction of the estrogen receptor/ligand complex with a DNA estrogen response element is known to regulate gene transcription. In turn, specific conformations of the receptor-ligand complex have been postulated to influence unique subsets of estrogen-responsive genes resulting in differential modulation and, ultima...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Grese TA,Sluka JP,Bryant HU,Cullinan GJ,Glasebrook AL,Jones CD,Matsumoto K,Palkowitz AD,Sato M,Termine JD,Winter MA,Yang NN,Dodge JA

更新日期：1997-12-09 00:00:00

abstract：:Plant mortality and birth rates are critical components of plant life history affecting the stability of plant populations and the ecosystems they form. Although allometric theory predicts that both plant birth and mortality rates should be size-dependent, this prediction has not yet been tested across plants ranging ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Marbà N,Duarte CM,Agustí S

更新日期：2007-10-02 00:00:00

abstract：:Functional reconstitution of membrane proteins within lipid bilayers is crucial for understanding their biological function in living cells. While this strategy has been extensively used with liposomes, reconstitution of membrane proteins in lipidic cubic mesophases presents significant challenges related to the struc...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Speziale C,Salvati Manni L,Manatschal C,Landau EM,Mezzenga R

更新日期：2016-07-05 00:00:00

abstract：:The crystal structure of DsRed, a red fluorescent protein from a corallimorpharian, has been determined at 2.0-A resolution by multiple-wavelength anomalous dispersion and crystallographic refinement. Crystals of the selenomethionine-substituted protein have space group P2(1) and contain a tetramer with 222 noncrystal...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Yarbrough D,Wachter RM,Kallio K,Matz MV,Remington SJ

更新日期：2001-01-16 00:00:00

abstract：:Unlike the dominant role of one class II invariant chain peptide (CLIP) in blocking MHC class II, comparative lipidomics analysis shows that human cluster of differentiation (CD) proteins CD1a, CD1b, CD1c, and CD1d bind lipids corresponding to hundreds of diverse accurate mass retention time values. Although most ions...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Huang S,Cheng TY,Young DC,Layre E,Madigan CA,Shires J,Cerundolo V,Altman JD,Moody DB

更新日期：2011-11-29 00:00:00

abstract：:The rapidly expanding network of roads into the Amazon is permanently altering the world's largest tropical forest. Most proposed road projects lack rigorous impact assessments or even basic economic justification. This study analyzes the expected environmental, social and economic impacts of 75 road projects, totalin...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Vilela T,Malky Harb A,Bruner A,Laísa da Silva Arruda V,Ribeiro V,Auxiliadora Costa Alencar A,Julissa Escobedo Grandez A,Rojas A,Laina A,Botero R

更新日期：2020-03-31 00:00:00

abstract：:Mutations in the gene encoding the transcription factor autoimmune regulator (AIRE) are responsible for autoimmune polyendocrinopathy candidiasis ectodermal dystrophy syndrome. AIRE directs expression of tissue-restricted antigens in the thymic medulla and in lymph node stromal cells and thereby substantially contribu...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Pomié C,Vicente R,Vuddamalay Y,Lundgren BA,van der Hoek M,Enault G,Kagan J,Fazilleau N,Scott HS,Romagnoli P,van Meerwijk JP

更新日期：2011-07-26 00:00:00

abstract：:In aqueous solution, aldehydes, and to a lesser extent ketones, hydrate to form geminal diols. We investigate the hydration of methylglyoxal (MG) in the gas phase, a process not previously considered to occur in water-restricted environments. In this study, we spectroscopically identified methylglyoxal diol (MGD) and ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Axson JL,Takahashi K,De Haan DO,Vaida V

更新日期：2010-04-13 00:00:00

abstract：:The CD4 receptor contributes to T-cell activation by coligating major histocompatibility complex class II on antigen presenting cells with the T-cell receptor (TCR)/CD3 complex, and triggering a cascade of signaling events including tyrosine phosphorylation of intracellular proteins. Paradoxically, CD3 cross-linking p...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Desbarats J,Freed JH,Campbell PA,Newell MK

更新日期：1996-10-01 00:00:00

abstract：:Higher plants process two distinct, nuclear gene-encoded glyceraldehyde-3-phosphate dehydrogenase (GAPDH) proteins, a Calvin-cycle enzyme active within chloroplasts and a glycolytic enzyme active within the cytosol. The gene for the chloroplast enzyme was previously suggested to be of endosymbiotic origin. Since the a...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Martin W,Brinkmann H,Savonna C,Cerff R

更新日期：1993-09-15 00:00:00

abstract：:Expression of the bovine papillomavirus E2 regulatory protein in human cervical carcinoma cell lines repressed expression of the resident human papillomavirus E6 and E7 oncogenes and within a few days caused essentially all of the cells to synchronously display numerous phenotypic markers characteristic of cells under...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Goodwin EC,Yang E,Lee CJ,Lee HW,DiMaio D,Hwang ES

更新日期：2000-09-26 00:00:00

abstract：:Trimeric class I virus fusion proteins undergo a series of conformational rearrangements that leads to the association of C- and N-terminal heptad repeat domains in a "trimer-of-hairpins" structure, facilitating the apposition of viral and cellular membranes during fusion. This final fusion hairpin structure is sustai...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Cianci C,Langley DR,Dischino DD,Sun Y,Yu KL,Stanley A,Roach J,Li Z,Dalterio R,Colonno R,Meanwell NA,Krystal M

更新日期：2004-10-19 00:00:00

abstract：:The functional significance of the portal vascular link between the beta cells of the pancreatic islets and the liver has not been established. Previous studies indicated that insulin does not acutely regulate glucose metabolism by a direct hepatic effect. More recent observations suggest that the role of insulin in r...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Griffen SC,Russell SM,Katz LS,Nicoll CS

更新日期：1987-10-01 00:00:00

abstract：:Yeast fatty acid synthetase consists of two multifunctional proteins, alpha and beta, which are arranged in a complex of alpha(6)beta(6). Electron microscopic studies of this complex led to a model for the synthetase as an ovate structure consisting of an equatorial plate-like structure to which six arches are equally...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Stoops JK,Wakil SJ

更新日期：1980-08-01 00:00:00

abstract：:The conservation of developmental functions exerted by Antp-class homeoproteins in protostomes and deuterostomes suggested that homologs with related functions are present in diploblastic animals. Our phylogenetic analyses showed that Antp-class homeodomains belong either to non-Hox or to Hox/paraHox families. Among t...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Gauchat D,Mazet F,Berney C,Schummer M,Kreger S,Pawlowski J,Galliot B

更新日期：2000-04-25 00:00:00

abstract：:A Jurassic salamander, Beiyanerpeton jianpingensis (gen. et sp. nov.), from a recently found site in western Liaoning Province, China is the earliest known record of Salamandroidea. As a Late Jurassic record of the group, it extends the range of the clade by ~40 Ma. The Late Jurassic taxon is neotenic and represented ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Gao KQ,Shubin NH

更新日期：2012-04-10 00:00:00

abstract：:Previous work on perceptual decision making in the sensorimotor system has shown population dynamics in the beta band, corresponding to the encoding of stimulus properties and the final decision outcome. Here, we asked how oscillatory dynamics in the medial premotor cortex (MPC) contribute to supramodal perceptual dec...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Haegens S,Vergara J,Rossi-Pool R,Lemus L,Romo R

更新日期：2017-12-26 00:00:00

abstract：:Cactus, a Drosophila homologue of I kappa B, binds to and inhibits Dorsal, a homologue of the p50 and p65 components of NF-kappa B. We describe experiments in yeast with various Dorsal and Cactus derivatives showing that Cactus blocks the DNA binding and nuclear localization functions of Dorsal. In contrast, Dorsal's ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Lehming N,McGuire S,Brickman JM,Ptashne M

更新日期：1995-10-24 00:00:00

abstract：:Glycogen synthase kinase 3 (GSK-3) is implicated in multiple biological processes including metabolism, gene expression, cell fate determination, proliferation, and survival. GSK-3 activity is inhibited through phosphorylation of serine 21 in GSK-3 alpha and serine 9 in GSK-3 beta. These serine residues of GSK-3 have ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Fang X,Yu SX,Lu Y,Bast RC Jr,Woodgett JR,Mills GB

更新日期：2000-10-24 00:00:00

abstract：:Transgenic sorghum plants have been obtained after microprojectile bombardment of immature zygotic embryos of a drought-resistant sorghum cultivar, P898012. DNA delivery parameters were optimized based on transient expression of R and C1 maize anthocyanin regulatory elements in scutellar cells. The protocol for obtain...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Casas AM,Kononowicz AK,Zehr UB,Tomes DT,Axtell JD,Butler LG,Bressan RA,Hasegawa PM

更新日期：1993-12-01 00:00:00

abstract：:Forests play a key role in the carbon balance of terrestrial ecosystems. One of the main uncertainties in global change predictions lies in how the spatiotemporal dynamics of forest productivity will be affected by climate warming. Here we show an increasing influence of climate on the spatial variability of tree grow...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Shestakova TA,Gutiérrez E,Kirdyanov AV,Camarero JJ,Génova M,Knorre AA,Linares JC,Resco de Dios V,Sánchez-Salguero R,Voltas J

更新日期：2016-01-19 00:00:00

abstract：:Pseudomonas aeruginosa is a ubiquitous bacterium that survives in many environments, including as an acute and chronic pathogen in humans. Substantial evidence shows that P. aeruginosa behavior is affected by its motility, and appendages known as flagella and type IV pili (TFP) are known to confer such motility. The r...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Anyan ME,Amiri A,Harvey CW,Tierra G,Morales-Soto N,Driscoll CM,Alber MS,Shrout JD

更新日期：2014-12-16 00:00:00

abstract：:Social interactions are fundamental for human behavior, but the quantification of their neural underpinnings remains challenging. Here, we used hyperscanning functional MRI (fMRI) to study information flow between brains of human dyads during real-time social interaction in a joint attention paradigm. In a hardware se...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Bilek E,Ruf M,Schäfer A,Akdeniz C,Calhoun VD,Schmahl C,Demanuele C,Tost H,Kirsch P,Meyer-Lindenberg A

更新日期：2015-04-21 00:00:00