Cloning and characterization of a cell surface receptor for xenotropic and polytropic murine leukemia viruses.

abstract：:Vertebrate hematopoietic stem cells are derived from vental mesoderm, which is postulated to migrate to both extra- and intraembryonic positions during gastrula and neurula stages. Extraembryonic migration has previously been documented, but the origin and migration of intraembryonic hematopoietic cells have not been ...

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

authors： Detrich HW 3rd,Kieran MW,Chan FY,Barone LM,Yee K,Rundstadler JA,Pratt S,Ransom D,Zon LI

更新日期：1995-11-07 00:00:00

abstract：:In this article we report an experiment that examines how demand-side bidding can discipline generators in a market for electric power. First we develop a treatment without demand-side bidding; two large firms are allocated baseload and intermediate cost generators such that either firm might unilaterally withhold the...

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

authors： Rassenti SJ,Smith VL,Wilson BJ

更新日期：2003-03-04 00:00:00

abstract：:Overaccumulation of abnormally organized mitochondria in so-called "ragged-red" skeletal muscle fibers is a morphological hallmark of mitochondrial myopathies, in particular of mitochondrial encephalomyopathies. Characteristic for the abnormal mitochondria is the occurrence of highly ordered crystalline inclusions. Im...

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

authors： Stadhouders AM,Jap PH,Winkler HP,Eppenberger HM,Wallimann T

更新日期：1994-05-24 00:00:00

abstract：:Trust is a critical social process that helps us to cooperate with others and is present to some degree in all human interaction. However, the underlying brain mechanisms of conditional and unconditional trust in social reciprocal exchange are still obscure. Here, we used hyperfunctional magnetic resonance imaging, in...

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

authors： Krueger F,McCabe K,Moll J,Kriegeskorte N,Zahn R,Strenziok M,Heinecke A,Grafman J

更新日期：2007-12-11 00:00:00

abstract：:Tidal deltas are characterized by a dendritic network of distributaries that transport water and sediments to the ocean. Here, I show that the distributaries self-organize to uniformly redistribute the tidal prism across the entire delta system. The 2 opposite mechanisms of channel formation by avulsion and channel ab...

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

authors： Fagherazzi S

更新日期：2008-12-02 00:00:00

abstract：:Many cells exhibit periodic transient increases in cytosolic calcium levels rather than a sustained rise when stimulated by a hormone or growth factor. We propose here a molecular model that accounts for periodic calcium spiking induced by a constant stimulus. Four elements give rise to repetitive calcium transients: ...

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

authors： Meyer T,Stryer L

更新日期：1988-07-01 00:00:00

abstract：:Natively unfolded proteins play key roles in normal and pathological biochemical processes. Despite their importance for function, this category of proteins remains beyond the reach of classical structural biology because of their inherent conformational heterogeneity. We present a description of the intrinsic conform...

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

authors： Bernadó P,Blanchard L,Timmins P,Marion D,Ruigrok RW,Blackledge M

更新日期：2005-11-22 00:00:00

abstract：:A system is described for assembling infectious bacteriophage phi 6 nucleocapsids in vitro. Procapsids encoded by cDNA copies of genomic segment L in Escherichia coli were used to package and replicate viral RNA segments. The resulting filled particles were shown to be capable of infecting host cell spheroplasts after...

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

authors： Olkkonen VM,Gottlieb P,Strassman J,Qiao XY,Bamford DH,Mindich L

更新日期：1990-12-01 00:00:00

abstract：:Induction of longstanding immunologic tolerance is essential for survival of transplanted organs and tissues. Despite recent advances in immunosuppression protocols, allograft damage inflicted by antibody specific for donor organs continues to represent a major obstacle to graft survival. Here we report that activatio...

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

authors： Choi JY,Eskandari SK,Cai S,Sulkaj I,Assaker JP,Allos H,AlHaddad J,Muhsin SA,Alhussain E,Mansouri A,Yeung MY,Seelen MAJ,Kim HJ,Cantor H,Azzi JR

更新日期：2020-03-17 00:00:00

abstract：:Mechanisms of bacterial pathogenesis have become an increasingly important subject as pathogens have become increasingly resistant to current antibiotics. The adhesion of microorganisms to the surface of host tissue is often a first step in pathogenesis and is a plausible target for new antiinfective agents. Examinati...

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

authors： Liang MN,Smith SP,Metallo SJ,Choi IS,Prentiss M,Whitesides GM

更新日期：2000-11-21 00:00:00

abstract：:An antigen histochemically localized in the nuclei and cytoplasmic granules of normal and leukemic human myeloid cells has been identified as myeloperoxidase (MPO; EC 1.11.1.7). The localization and amount of the enzyme was determined by using a murine monoclonal antibody designated H-43-5 raised against nuclear prote...

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

authors： Murao S,Stevens FJ,Ito A,Huberman E

更新日期：1988-02-01 00:00:00

abstract：:Phosphoinositides are essential lipid regulators of trafficking and signaling pathways of all eukaryotic cells. Phosphatidylinositol 4-phosphate (PtdIns4P) is an intermediate in the synthesis of several important phosphoinositide species but also serves as a regulatory molecule in its own right. Phosphatidylinositol 4...

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

authors： Szentpetery Z,Várnai P,Balla T

更新日期：2010-05-04 00:00:00

abstract：:Hematin administered intravenously in a patient with congenital erythropoietic porphyria evidently entered erythrocyte precursors in the bone marrow, producing the well-known negative feedback repression of porphyrin biosynthesis with marked decline of porphyrin concentrations in urine, circulating plasma, and erythro...

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

authors： Watson CJ,Bossenmaier I,Cardinal R,Petryka ZJ

更新日期：1974-02-01 00:00:00

abstract：:The ciliary epithelium in the eye consists of pigmented epithelial cells that express the α1β1 isoform of Na,K-ATPase and nonpigmented epithelial cells that express mainly the α2β3 isoform. In principle, a Na,K-ATPase inhibitor with selectivity for α2β3 that penetrates the cornea could effectively reduce intraocular p...

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

authors： Katz A,Tal DM,Heller D,Habeck M,Ben Zeev E,Rabah B,Bar Kana Y,Marcovich AL,Karlish SJ

更新日期：2015-11-03 00:00:00

abstract：:Using a comprehensive transcriptome analysis, a Z chromosome-linked chicken homolog of hemogen (cHEMGN) was identified and shown to be specifically involved in testis differentiation in early chicken embryos. Hemogen [Hemgn in mice, EDAG (erythroid differentiation-associated gene protein) in humans] was recently chara...

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

authors： Nakata T,Ishiguro M,Aduma N,Izumi H,Kuroiwa A

更新日期：2013-02-26 00:00:00

abstract：:Nanos (Nos) is an evolutionarily conserved protein essential for the survival of primordial germ cells. In Drosophila, maternal Nos partitions into pole cells and suppresses apoptosis to permit proper germ-line development. However, how this critical event is regulated by Nos has remained elusive. Here, we report that...

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

authors： Sato K,Hayashi Y,Ninomiya Y,Shigenobu S,Arita K,Mukai M,Kobayashi S

更新日期：2007-05-01 00:00:00

abstract：:A number of distressing trends, including a decline in the share of key research grants going to younger scientists, as well as a steady rise in the age at which investigators receive their first funding, are now a decades-long feature of the US biomedical research workforce. Working committees have proposed recommend...

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

authors： Daniels RJ

更新日期：2015-01-13 00:00:00

abstract：:The Helicobacter pylori immunodominant protein, CagA, is associated with severe gastritis and carcinoma. Injection of CagA into gastric epithelial cells by type IV secretion leads to actin-cytoskeletal rearrangements and cell scattering. CagA has been reported to have no role in the induction of transcription factor N...

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

authors： Brandt S,Kwok T,Hartig R,König W,Backert S

更新日期：2005-06-28 00:00:00

abstract：:In vitro translation of Rous sarcoma virus (RSV) virion RNA in the messenger-dependent reticulocyte lysate system yielded polypeptides that were not synthesized by translation of RNA from a transformation-defective deletion mutant of RSV. These RSV-specific products migrated on sodium dodecyl sulfate/polyacrylamide ge...

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

authors： Beemon K,Hunter T

更新日期：1977-08-01 00:00:00

abstract：:We present a model for transposition that allows a choice between cointegrate formation (replicon fusion) and direct transposition. We propose that initiation of the process occurs by invasion of the target DNA by a single-stranded end of the transposable element. This leads to nicking of one of the DNA strands of the...

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

authors： Galas DJ,Chandler M

更新日期：1981-08-01 00:00:00

abstract：:The wide diversity of dendritic trees is one of the most striking features of neural circuits. Here we develop a general quantitative theory relating the total length of dendritic wiring to the number of branch points and synapses. We show that optimal wiring predicts a 2/3 power law between these measures. We demonst...

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

authors： Cuntz H,Mathy A,Häusser M

更新日期：2012-07-03 00:00:00

abstract：:There is now abundant evidence to substantiate an important role of hepatitis C virus (HCV) core protein in cellular gene expression as well as in the viral cycle. Thus the subcellular localization of this protein has important implications. However, several studies have shown controversial results: the HCV core has b...

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

authors： Barba G,Harper F,Harada T,Kohara M,Goulinet S,Matsuura Y,Eder G,Schaff Z,Chapman MJ,Miyamura T,Bréchot C

更新日期：1997-02-18 00:00:00

abstract：:Posttranslational modifications (PTMs) of α-synuclein (α-syn), e.g., phosphorylation, play an important role in modulating α-syn pathology in Parkinson's disease (PD) and α-synucleinopathies. Accumulation of phosphorylated α-syn fibrils in Lewy bodies and Lewy neurites is the histological hallmark of these diseases. H...

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

authors： Zhao K,Lim YJ,Liu Z,Long H,Sun Y,Hu JJ,Zhao C,Tao Y,Zhang X,Li D,Li YM,Liu C

更新日期：2020-08-18 00:00:00

abstract：:I summarize recent computational and experimental work that addresses the inherent variability in the synaptic and intrinsic conductances in normal healthy brains and shows that multiple solutions (sets of parameters) can produce similar circuit performance. I then discuss a number of issues raised by this observation...

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

authors： Marder E

更新日期：2011-09-13 00:00:00

abstract：:The 72-kDa spleen tyrosine kinase (Syk) and Src-family kinase p53/56Lyn (Lyn) contribute to signaling via the B-cell antigen receptor complex. Here we show that Syk and Lyn from human B lymphocytes can interact directly. Syk and Lyn coimmunoprecipitated from mature and activated B-cell lines, and gel-purified Syk and ...

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

authors： Sidorenko SP,Law CL,Chandran KA,Clark EA

更新日期：1995-01-17 00:00:00

abstract：:Thirty percent of the 189 tumors studied to date express DNA polymerase beta variants. One of these variants was identified in a prostate carcinoma and is altered from isoleucine to methionine at position 260, within the hydrophobic hinge region of the protein. Another variant was identified in a colon carcinoma and i...

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

authors： Sweasy JB,Lang T,Starcevic D,Sun KW,Lai CC,Dimaio D,Dalal S

更新日期：2005-10-04 00:00:00

abstract：:Message passing is a fundamental technique for performing calculations on networks and graphs with applications in physics, computer science, statistics, and machine learning, including Bayesian inference, spin models, satisfiability, graph partitioning, network epidemiology, and the calculation of matrix eigenvalues....

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

authors： Cantwell GT,Newman MEJ

更新日期：2019-11-19 00:00:00

abstract：:A polypeptide was purified from rat hypothalamic extracts on the basis of its high intrinsic activity to release corticotropin (ACTH) from cultured rat anterior pituitary cells and its immunoactivity in a radioimmunoassay directed against the NH2 terminus (residues 4-20) of ovine hypothalamic corticotropin-releasing f...

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

authors： Rivier J,Spiess J,Vale W

更新日期：1983-08-01 00:00:00

abstract：:Electron micrographs of replicating lambda DNA molecules, during the period of progeny-particle DNA formation, show single-tailed circular structures. The tails are, predominantly, shorter than one viral genome. ...

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

authors： Kiger JA Jr,Sinsheimer RL

更新日期：1971-01-01 00:00:00

abstract：:We have isolated two recombinant cDNAs whose corresponding RNAs have an increased abundance in scrapie-infected hamster brain. DNA sequence analysis has shown that these two recombinants represent the genes for sulfated glycoprotein 2 and transferrin. The abundance of sulfated glycoprotein 2 RNA is increased in hippoc...

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

authors： Duguid JR,Bohmont CW,Liu NG,Tourtellotte WW

更新日期：1989-09-01 00:00:00