Chemistry of acetylene on platinum (111) and (100) surfaces.

abstract：:Nonsense-mediated mRNA decay (NMD), which degrades transcripts harboring a premature termination codon (PTC), depends on the helicase up-frameshift 1 (UPF1). However, mRNAs that are not NMD targets also bind UPF1. What governs the timing, position, and function of UPF1 binding to mRNAs remains unclear. We provide evid...

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

authors： Kurosaki T,Maquat LE

更新日期：2013-02-26 00:00:00

abstract：:Silencing of multiple cancer-related genes is associated with de novo methylation of linked CpG islands. Additionally, bivalent histone modification profiles characterized by the juxtaposition of active and inactive histone marks have been observed in genes that become hypermethylated in cancer. It is unknown how thes...

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

authors： Rodriguez J,Muñoz M,Vives L,Frangou CG,Groudine M,Peinado MA

更新日期：2008-12-16 00:00:00

abstract：:BCL6 encodes a transcriptional repressor that is essential for the germinal center (GC) reaction and important in lymphomagenesis. Although its promoter has been well studied, little is known concerning its possible regulation by more distal elements. To gain such information, we mapped critical histone modifications ...

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

authors： Ramachandrareddy H,Bouska A,Shen Y,Ji M,Rizzino A,Chan WC,McKeithan TW

更新日期：2010-06-29 00:00:00

abstract：:In order to assess whether DNA rearrangement occurs with equal frequency at each of the several J (joining region) elements in the mouse kappa light chain locus, we set out to determine the relative frequency of usage of J kappa segments in populations of B lymphocytes unperturbed by antigenic selection or cloning. To...

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

authors： Wood DL,Coleclough C

更新日期：1984-08-01 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：:Oncolytic viruses constitute a promising therapy against malignant gliomas (MGs). However, virus-induced type I IFN greatly limits its clinical application. The kinase mammalian target of rapamycin (mTOR) stimulates type I IFN production via phosphorylation of its effector proteins, 4E-BPs and S6Ks. Here we show that ...

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

authors： Alain T,Lun X,Martineau Y,Sean P,Pulendran B,Petroulakis E,Zemp FJ,Lemay CG,Roy D,Bell JC,Thomas G,Kozma SC,Forsyth PA,Costa-Mattioli M,Sonenberg N

更新日期：2010-01-26 00:00:00

abstract：:Previous studies have identified nuclear matrix attachment regions (MARs) that are closely associated with transcriptional enhancers in the IgH, Igkappa, and T cell receptor (TCR) beta loci, but have yielded conflicting information regarding their functional significance. In this report, a combination of in vitro and ...

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

authors： Zhong XP,Carabaña J,Krangel MS

更新日期：1999-10-12 00:00:00

abstract：:Evidence had been provided that a disulfide-linked [125I]iodotyramine/poly(D-lysine) conjugate was reductively cleaved when bound nonspecifically to the surface of Chinese hamster ovary (CHO) cells and that this cleavage was abolished by membrane-impermeant sulfhydryl blockers. The same blockers were subsequently foun...

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

authors： Mandel R,Ryser HJ,Ghani F,Wu M,Peak D

更新日期：1993-05-01 00:00:00

abstract：:Mice with a targeted deletion of beta3 integrin were used to examine the process by which tumor cells metastasize and destroy bone. Injection of B16 melanoma cells into the left cardiac ventricle resulted in osteolytic bone metastasis in 74% of beta3+/+ mice by 14 days. In contrast, only 4% of beta3-/- mice developed ...

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

authors： Bakewell SJ,Nestor P,Prasad S,Tomasson MH,Dowland N,Mehrotra M,Scarborough R,Kanter J,Abe K,Phillips D,Weilbaecher KN

更新日期：2003-11-25 00:00:00

abstract：:The 5' end of a eukaryotic mRNA transcript generally has a 7-methylguanosine (m7G) cap that protects mRNA from degradation and mediates almost all other aspects of gene expression. Some RNAs in Escherichia coli, yeast, and mammals were recently found to contain an NAD+ cap. Here, we report the development of the metho...

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

authors： Zhang H,Zhong H,Zhang S,Shao X,Ni M,Cai Z,Chen X,Xia Y

更新日期：2019-06-11 00:00:00

abstract：:G protein-coupled receptors (GPCRs) are seven-transmembrane proteins that transmit diverse extracellular signals across a membrane. Herpesvirus genomes encode multiple GPCRs implicated in viral pathogenesis. Kaposi sarcoma-associated herpesvirus GPCR (kGPCR) activates proliferative pathways and, when expressed in endo...

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

authors： Wang Y,Lu X,Zhu L,Shen Y,Chengedza S,Feng H,Wang L,Jung JU,Gutkind JS,Feng P

更新日期：2013-07-02 00:00:00

abstract：:Adenosine deaminases that act on RNA (ADARs) constitute a family of RNA-editing enzymes that convert adenosine to inosine within double-stranded regions of RNA. We previously developed a method to identify inosine-containing RNAs and used it to identify five ADAR substrates in Caenorhabditis elegans. Here we use the s...

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

authors： Morse DP,Aruscavage PJ,Bass BL

更新日期：2002-06-11 00:00:00

abstract：:The rearrangement of immunoglobulin genes in B-lymphocyte precursors requires the expression of the recombination activating genes (Rag), which leads to the generation of a highly diverse B-cell repertoire. We can use the level of Rag-1 mRNA in the bone marrow as an index of its capacity to support the maturation of B...

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

authors： Ben-Yehuda A,Szabo P,Dyall R,Weksler ME

更新日期：1994-12-06 00:00:00

abstract：:Gene III protein of bacteriophage f1 is inserted into the host cell membrane where it is assembled into phage particles. A truncated form of gene III protein, encoded by a recombinant plasmid and lacking the carboxyl terminus, does not remain in the membrane but instead appears to slip through it. Fusion of a hydropho...

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

authors： Boeke JD,Model P

更新日期：1982-09-01 00:00:00

abstract：:We have inserted the sequence 5'-AAG-GAGGU-3', which is complementary to the 3' terminus of Escherichia coli 16S rRNA, in a reading frame and analyzed its effect on the accuracy and overall rate of translation in vivo. Translation over the sequence yields a 50% ribosomal frameshift if the reading phase is A-AGG-AGG-U....

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

authors： Spanjaard RA,van Duin J

更新日期：1988-11-01 00:00:00

abstract：:Ca channel currents were studied in freshly dispersed bovine adrenal glomerulosa cells to better understand the control of aldosterone secretion by extracellular K concentration (Ko) and angiotensin II (AII). The whole-cell variation of the patch voltage clamp technique was used. Two types of Ca channels were found. O...

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

authors： Cohen CJ,McCarthy RT,Barrett PQ,Rasmussen H

更新日期：1988-04-01 00:00:00

abstract：:Astrogenesis is repressed in the early embryonic period and occurs in the late embryonic period. A variety of external and internal signals contribute to the sequential differentiation of neural stem cells. Here, we discovered that immune-related CD93 plays a critical negative role in the regulation of astrogenesis in...

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

authors： Liang Q,Su L,Zhang D,Jiao J

更新日期：2020-04-28 00:00:00

abstract：:Many experiments have been done to determine how far and how freely holes can move along the stack of base pairs in DNA. The results of these experiments are usually described in terms of a parameter beta under the assumption that it describes an exponential decay with distance. The reported values range from beta < 0...

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

authors： Conwell EM,Rakhmanova SV

更新日期：2000-04-25 00:00:00

abstract：:The largest known DNA viruses infect Acanthamoeba and belong to two markedly different families. The Megaviridae exhibit pseudo-icosahedral virions up to 0.7 μm in diameter and adenine-thymine (AT)-rich genomes of up to 1.25 Mb encoding a thousand proteins. Like their Mimivirus prototype discovered 10 y ago, they enti...

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

authors： Legendre M,Bartoli J,Shmakova L,Jeudy S,Labadie K,Adrait A,Lescot M,Poirot O,Bertaux L,Bruley C,Couté Y,Rivkina E,Abergel C,Claverie JM

更新日期：2014-03-18 00:00:00

abstract：:Multiple cues, across multiple sensory modalities, are involved in mate choice in a wide range of animal taxa. This multiplicity leads to the prediction that, in adaptive radiations, sexual isolation results from divergence in multiple dimensions. However, difficulties in directly measuring preferences and detecting m...

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

authors： Hohenlohe PA,Arnold SJ

更新日期：2010-09-21 00:00:00

abstract：:Mast cells with the morphological and biochemical properties of mucosal mast cells (MMC) appear and proliferate to form the predominant cell type in rat bone marrow cultures stimulated with factors from antigen- or mitogen-activated lymphocytes. Conditioned media causing a selective proliferation of MMC were derived f...

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

authors： Haig DM,McMenamin C,Gunneberg C,Woodbury R,Jarrett EE

更新日期：1983-07-01 00:00:00

abstract：:We propose a conceptual model for the cytoskeletal organization of endothelial cells (ECs) based on a major dichotomy in structure and function at basal and apical aspects of the cells. Intracellular distributions of filamentous actin (F-actin), vinculin, paxillin, ZO-1, and Cx43 were analyzed from confocal micrograph...

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

authors： Thi MM,Tarbell JM,Weinbaum S,Spray DC

更新日期：2004-11-23 00:00:00

abstract：:Gelation of colloidal nanocrystals emerged as a strategy to preserve inherent nanoscale properties in multiscale architectures. However, available gelation methods to directly form self-supported nanocrystal networks struggle to reliably control nanoscale optical phenomena such as photoluminescence and localized surfa...

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

authors： Saez Cabezas CA,Ong GK,Jadrich RB,Lindquist BA,Agrawal A,Truskett TM,Milliron DJ

更新日期：2018-09-04 00:00:00

abstract：:The maximum rate of expression of the lac operon is severely reduced in lac promoter mutants. Revertants of these mutations which produce higher levels of enzyme were isolated. Some of these revertants had lost sensitivity to catabolite repression and transient repression. The mutations responsible for these losses to...

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

authors： Silverstone AE,Arditti RR,Magasanik B

更新日期：1970-07-01 00:00:00

abstract：:We used a high-titer recombinant adeno-associated virus (rAAV) vector to express WT or mutant human alpha-synuclein in the substantia nigra of adult marmosets. The alpha-synuclein protein was expressed in 90-95% of all nigral dopamine neurons and distributed by anterograde transport throughout their axonal and dendrit...

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

authors： Kirik D,Annett LE,Burger C,Muzyczka N,Mandel RJ,Björklund A

更新日期：2003-03-04 00:00:00

abstract：:By using an indirect immunofluorescence technique, the distribution of poly(ADP-ribose) synthesis in human blood cells was investigated. The antibody used was reactive with poly(ADP-ribose) larger than trimers. The specific immunofluorescence of poly(ADP-ribose) synthesized in situ from NAD+ was observed in nuclei of ...

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

authors： Ikai K,Ueda K,Fukushima M,Nakamura T,Hayaishi O

更新日期：1980-06-01 00:00:00

abstract：:Intracolonic administration of trinitrobenzene sulfonic acid in mice causes inflammation in the colon that is accompanied by increased expression of proinflammatory cytokines and of the substance P (SP), neurokinin 1 receptor (NK-1R) in the proximal mesenteric fat depot. We also investigated whether human mesenteric p...

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

authors： Karagiannides I,Kokkotou E,Tansky M,Tchkonia T,Giorgadze N,O'Brien M,Leeman SE,Kirkland JL,Pothoulakis C

更新日期：2006-03-28 00:00:00

abstract：:Posttranscriptional RNA regulation is important in determining the plasticity of cellular phenotypes. However, mechanisms of how RNA binding proteins (RBPs) influence cellular behavior are poorly understood. We show here that the RBP embryonic lethal abnormal vision like 1 (ELAVL1, also know as HuR) regulates the alte...

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

authors： Chang SH,Elemento O,Zhang J,Zhuang ZW,Simons M,Hla T

更新日期：2014-12-23 00:00:00

abstract：:Escherichia coli fMet-tRNAfMet alters the pattern of promoter selection of E. coli RNA polymerase (RNA nucleotidyltransferase, nucleosidetriphosphate:RNA nucleotidyltransferase; EC 2.7.7.6), affecting RNA synthesis from the rRNA, suIII+tRNA, and lac promoters in different ways. The in vitro synthesis of the stable RNA...

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

authors： Debenham PG,Pongs O,Travers AA

更新日期：1980-02-01 00:00:00

abstract：:B-G antigens are cell-surface molecules encoded by a highly polymorphic multigene family located in the chicken major histocompatibility complex (MHC). Rabbit antisera to B-G molecules immunoprecipitate 3-6 bands from iodinated erythrocytes by sodium dodecyl sulfate (SDS) gels under reducing conditions. These are all ...

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

authors： Kaufman J,Salomonsen J,Skjødt K,Thorpe D

更新日期：1990-11-01 00:00:00