Reexamination of human T cell lymphotropic virus (HTLV-I/II) prevalence.

abstract：:The hydroxyl radical (OH) is the primary oxidant in the troposphere, and the impact of its fluctuations on the methane budget has been disputed in recent years, however measurements of OH are insufficient to characterize global interannual fluctuations relevant for methane. Here, we use a 6,000-y control simulation of...

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

authors： Turner AJ,Fung I,Naik V,Horowitz LW,Cohen RC

更新日期：2018-09-04 00:00:00

abstract：:Smad proteins are key intracellular signaling effectors for the transforming growth factor-beta superfamily of peptide growth factors. Following receptor-induced activation, Smads move into the nucleus to activate transcription of a select set of target genes. The activity of Smad proteins must be tightly regulated to...

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

authors： Zhang Y,Chang C,Gehling DJ,Hemmati-Brivanlou A,Derynck R

更新日期：2001-01-30 00:00:00

abstract：:To elucidate the molecular mechanism of frameshift suppression by the SUF2 gene of yeast, the sequences of DNA fragments carrying the SUF2-1 and suf2+ alleles of the gene and surrounding regions have been determined. Comparison of the suppressor and wild-type sequences indicates that the SUF2 gene product is a proline...

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

authors： Cummins CM,Donahue TF,Culbertson MR

更新日期：1982-06-01 00:00:00

abstract：:G-protein-coupled receptors (GPCRs) are key signaling molecules and are intensely studied. Whereas GPCRs recognizing small-molecules have been successfully targeted for drug discovery, protein-recognizing GPCRs, such as the chemokine receptors, claim few drugs or even useful small molecule reagents. This reflects both...

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

authors： Mysinger MM,Weiss DR,Ziarek JJ,Gravel S,Doak AK,Karpiak J,Heveker N,Shoichet BK,Volkman BF

更新日期：2012-04-03 00:00:00

abstract：:The rate of reproduction of deep-sea bacteria from six different capture depths between 1957 and 10,476 meters was studied as a function of temperature and pressure. The results showed the following: the true deep-sea bacteria of different depths have several characteristics, presumably evolutionally derived, distingu...

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

authors： Yayanos AA

更新日期：1986-12-01 00:00:00

abstract：:Many models of morphogenesis are forced to assume specific mechanical properties of cells, because the actual mechanical properties of living tissues are largely unknown. Here, we measure the rheology of epithelial cells in the cellularizing Drosophila embryo by injecting magnetic particles and studying their response...

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

authors： Doubrovinski K,Swan M,Polyakov O,Wieschaus EF

更新日期：2017-01-31 00:00:00

abstract：:The 3' flanking region of the apolipoprotein B (apoB) gene contains a hypervariable region consisting of a variable number of tandemly repeated short A + T-rich DNA sequences (VNTRs). We present a general method that utilizes the polymerase chain reaction to rapidly and accurately type this and other VNTR loci. We use...

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

authors： Boerwinkle E,Xiong WJ,Fourest E,Chan L

更新日期：1989-01-01 00:00:00

abstract：:An electron density map at 3 angstrom resolution has been calculated for Cu2+, Zn2+ superoxide dismutase from bovine erythrocytes, and the course of the main chain has been traced. The dominant structural feature is an 8-stranded barrel of antiparallel beta-pleated sheet. There is one very short helical section and tw...

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

authors： Richardson J,Thomas KA,Rubin BH,Richardson DC

更新日期：1975-04-01 00:00:00

abstract：:A spherical harmonic analysis is made of the hydrodynamic equation governing the flow of an incompressible liquid in a rotating sphere in the presence of the magnetic Lorentz force. Nonlinear partial differential equations are derived for the functions S(n)(r,t) and T(n)(r,t) entering the spherical harmonic representa...

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

authors： Pekeris CL,Accad Y

更新日期：1975-04-01 00:00:00

abstract：:The ecological niche is a key concept for elucidating patterns of species distributions and developing strategies for conserving biodiversity. However, recent times are seeing a widespread debate whether species niches are conserved across space and time (niche conservatism hypothesis). Biological invasions represent ...

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

authors： Liu C,Wolter C,Xian W,Jeschke JM

更新日期：2020-09-22 00:00:00

abstract：:The radial distributions of the Calpha and side-chain atoms in a sample of 13 native proteins have been examined. It is found that there are substantial differences in behavior between different atoms of the same amino acid. In particular, the Calpha atoms of polar residues show no particular preference for being far ...

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

authors： Rackovsky S,Scheraga HA

更新日期：1977-12-01 00:00:00

abstract：:Diversity in 39 HLA-A, -B, and -C molecules is derived from 20 amino acid positions of high variability and 71 positions of low variability. Variation in the structurally homologous alpha 1 and alpha 2 domains is distinct and may correlate with partial segregation of peptide and T-cell receptor binding functions. Comp...

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

authors： Parham P,Lomen CE,Lawlor DA,Ways JP,Holmes N,Coppin HL,Salter RD,Wan AM,Ennis PD

更新日期：1988-06-01 00:00:00

abstract：:The in situ stimulation of Fe(III) oxide reduction by Geobacter bacteria leads to the concomitant precipitation of hexavalent uranium [U(VI)] from groundwater. Despite its promise for the bioremediation of uranium contaminants, the biological mechanism behind this reaction remains elusive. Because Fe(III) oxide reduct...

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

authors： Cologgi DL,Lampa-Pastirk S,Speers AM,Kelly SD,Reguera G

更新日期：2011-09-13 00:00:00

abstract：:Studies of the fluorescence polarization of 1,6-diphenyl-1,3,5-hexatriene in membranes of normal, transformed, and revertant 3T3 cells allowed estimation of microviscosities (eta) of the lipid bilayers of these cells. Fluorescence polarization values observed with normal cells were significantly lower than those obser...

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

authors： Fuchs P,Parola A,Robbins PW,Blout ER

更新日期：1975-09-01 00:00:00

abstract：:The field of perceptual learning has identified changes in perceptual templates as a powerful mechanism mediating the learning of statistical regularities in our environment. By measuring threshold-vs.-contrast curves using an orientation identification task under varying levels of external noise, the perceptual templ...

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

authors： Bejjanki VR,Zhang R,Li R,Pouget A,Green CS,Lu ZL,Bavelier D

更新日期：2014-11-25 00:00:00

abstract：:We have isolated a segment of DNA from the eukaryote Saccharomyces cerevisiae (baker's yeast) as a viable molecular hybrid of bacteriophage lambda DNA which, when integrated into the chromosome of an E. coli histidine auxotroph, allows this bacterium to grow in the absence of histidine. The nonrevertable, histidine au...

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

authors： Struhl K,Cameron JR,Davis RW

更新日期：1976-05-01 00:00:00

abstract：:To efficiently represent all of the possible rewards in the world, dopaminergic midbrain neurons dynamically adapt their coding range to the momentarily available rewards. Specifically, these neurons increase their activity for an outcome that is better than expected and decrease it for an outcome worse than expected,...

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

authors： Park SQ,Kahnt T,Talmi D,Rieskamp J,Dolan RJ,Heekeren HR

更新日期：2012-03-13 00:00:00

abstract：:Methane is a major greenhouse gas linked to global warming; however, patterns of in situ methane oxidation by methane-oxidizing bacteria (methanotrophs), nature's main biological mechanism for methane suppression, are often inconsistent with laboratory predictions. For example, one would expect a strong relationship b...

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

authors： Knapp CW,Fowle DA,Kulczycki E,Roberts JA,Graham DW

更新日期：2007-07-17 00:00:00

abstract：:The autophagic ubiquitin-like protein (ublp) autophagy-related (ATG)12 is a component of the ATG12∼ATG5-ATG16L1 E3 complex that promotes lipid conjugation of members of the LC3 ublp family. A role of ATG12 in the E3 complex is to recruit the E2 enzyme ATG3. Here we report the identification of the ATG12 binding sequen...

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

authors： Metlagel Z,Otomo C,Takaesu G,Otomo T

更新日期：2013-11-19 00:00:00

abstract：:Priming of the organ-specific premetastatic sites is thought to be an important yet incompletely understood step during metastasis. In this study, we show that the metastatic tumors we examined overexpress granulocyte-colony stimulating factor (G-CSF), which expands and mobilizes Ly6G+Ly6C+ granulocytes and facilitate...

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

authors： Kowanetz M,Wu X,Lee J,Tan M,Hagenbeek T,Qu X,Yu L,Ross J,Korsisaari N,Cao T,Bou-Reslan H,Kallop D,Weimer R,Ludlam MJ,Kaminker JS,Modrusan Z,van Bruggen N,Peale FV,Carano R,Meng YG,Ferrara N

更新日期：2010-12-14 00:00:00

abstract：:Protein kinase A (PKA) is activated during sympathetic stimulation of the heart and phosphorylates key proteins involved in cardiac Ca(2+) handling, including the L-type Ca(2+) channel (Ca(V)1.2) and phospholamban (PLN). This results in acceleration and amplification of the beat-to-beat changes in cytosolic Ca(2+) in ...

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

authors： Jones BW,Brunet S,Gilbert ML,Nichols CB,Su T,Westenbroek RE,Scott JD,Catterall WA,McKnight GS

更新日期：2012-10-16 00:00:00

abstract：:This paper reports a general in situ method to grow a polymer conjugate solely from the C terminus of a recombinant protein. GFP was fused at its C terminus with an intein; cleavage of the intein provided a unique thioester moiety at the C terminus of GFP that was used to install an atom transfer radical polymerizatio...

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

authors： Gao W,Liu W,Christensen T,Zalutsky MR,Chilkoti A

更新日期：2010-09-21 00:00:00

abstract：:Chick-limb mesodermal cells have been maintained in tissue culture under conditions that permit development of muscle and cartilage. 3-Acetylpyridine, a nicotinamide-antagonized muscle teratogen, potentiates chondrogenic expression in cell cultures, as evidenced by histological and biochemical criteria, including the ...

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

authors： Caplan AI,Stoolmiller AC

更新日期：1973-06-01 00:00:00

abstract：:Infection of mice with sporozoites of Plasmodium berghei or Plasmodium yoelii has been used extensively to evaluate liver-stage protection by candidate preerythrocytic malaria vaccines. Unfortunately, repeated success of such vaccines in mice has not translated readily to effective malaria vaccines in humans. Thus, mi...

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

authors： Schmidt NW,Podyminogin RL,Butler NS,Badovinac VP,Tucker BJ,Bahjat KS,Lauer P,Reyes-Sandoval A,Hutchings CL,Moore AC,Gilbert SC,Hill AV,Bartholomay LC,Harty JT

更新日期：2008-09-16 00:00:00

abstract：:The human carcinogen vinyl chloride is metabolized in the liver to reactive intermediates which form N2,3-ethenoguanine in DNA. N2,3-Ethenoguanine is known to cause G----A transitions during DNA replication in Escherichia coli, and its formation may be a carcinogenic event in higher organisms. To investigate the repai...

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

authors： Matijasevic Z,Sekiguchi M,Ludlum DB

更新日期：1992-10-01 00:00:00

abstract：:Control of transcription and enzyme activities are two interwoven regulatory systems essential for the function of a metabolic node. Saccharomyces cerevisiae strains differing in enzyme activities at the chorismate branch point of aromatic amino acid biosynthesis were constructed by recombinant DNA technology. Express...

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

authors： Krappmann S,Lipscomb WN,Braus GH

更新日期：2000-12-05 00:00:00

abstract：:The complete coding region of maize transposable element Ac and truncated but active derivatives of it were placed under the control of promoters of different strength and tested for the ability to excise transposable element Ds from a beta-glucuronidase reporter gene in a cotransfection assay in Petunia protoplasts. ...

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

authors： Becker D,Lütticke R,Li M,Starlinger P

更新日期：1992-06-15 00:00:00

abstract：:A calmodulin-neomycin-resistance fusion gene was introduced into Trypanosoma brucei by electroporation, and stably transformed cell lines were obtained. In all of the transformants, the fusion gene had integrated into the host genome at the cognate locus, evidently by homologous recombination within flanking calmoduli...

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

authors： Eid J,Sollner-Webb B

更新日期：1991-03-15 00:00:00

abstract：:A type of heritable cellular change, known as habituation, occurs spontaneously in plant tissue and cell culture. This phenomenon is characterized by a newly acquired capacity of plant cells to produce growth regulatory substances. Using cloned lines of tobacco pith parenchyma cells, we demonstrated that a newly acqui...

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

authors： Binns A,Meins F

更新日期：1973-09-01 00:00:00

abstract：:In response to vascular injury, vascular smooth muscle cells (VSMCs) may switch from a contractile to a proliferative phenotype thereby contributing to neointima formation. Previous studies showed that the long noncoding RNA (lncRNA) NEAT1 is critical for paraspeckle formation and tumorigenesis by promoting cell proli...

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

authors： Ahmed ASI,Dong K,Liu J,Wen T,Yu L,Xu F,Kang X,Osman I,Hu G,Bunting KM,Crethers D,Gao H,Zhang W,Liu Y,Wen K,Agarwal G,Hirose T,Nakagawa S,Vazdarjanova A,Zhou J

更新日期：2018-09-11 00:00:00