Substrate activation for O2 reactions by oxidized metal centers in biology.

abstract：:The binding of 125I-labeled wheat germ agglutinin (WGA) to parental and three distinct WGA-resistant Chinese hamster ovary cell lines possessing modified cell surface carbohydrate structures has been examined over a 10(6)-fold range of WGA concentrations. The Scatchard plot for WGA binding to parental cells was comple...

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

authors： Stanley P,Carver JP

更新日期：1977-11-01 00:00:00

abstract：:Defining prospective pathways by which zoonoses evolve and emerge as human pathogens is critical for anticipating and controlling both natural and deliberate pandemics. However, predicting tenable pathways of animal-to-human movement has been hindered by challenges in identifying reservoir species, cultivating zoonoti...

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

authors： Becker MM,Graham RL,Donaldson EF,Rockx B,Sims AC,Sheahan T,Pickles RJ,Corti D,Johnston RE,Baric RS,Denison MR

更新日期：2008-12-16 00:00:00

abstract：:The murine pre-B leukemic cell line 70Z/3 contains both an unrearranged immunoglobulin kappa-light-chain gene and a functionally rearranged but silent kappa-light-chain gene. Mitogenic stimulation of growing 70Z/3 cells with bacterial lipopolysaccharide (LPS) activates kappa-light-gene transcription and results in a 1...

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

authors： Wall R,Briskin M,Carter C,Govan H,Taylor A,Kincade P

更新日期：1986-01-01 00:00:00

abstract：:Asymmetric cell division is of fundamental importance in biology as it allows for the establishment of separate cell lineages during the development of multicellular organisms. Although microbial systems, including the yeast Saccharomyces cerevisiae, are excellent models of asymmetric cell division, this phenotype occ...

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

authors： Thorpe PH,Bruno J,Rothstein R

更新日期：2009-04-21 00:00:00

abstract：:HeLa cells grown in the presence of [methyl-3H]thymidine contained large amounts of 5-hydroxymethyl-2'-deoxyuridine (HMdU) in their DNA. When the cells were grown in [6-3H]thymidine and their DNA was labeled to the same specific activity, no HMdU was present. When such [6-3H]thymidine-labeled cells were exposed to inc...

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

authors： Teebor GW,Frenkel K,Goldstein MS

更新日期：1984-01-01 00:00:00

abstract：:The medial prefrontal cortex (mPFC) plays an essential role in regulating emotion, including inhibiting fear when danger has passed. The extinction of fear, however, is labile and a number of factors, including stress, cause extinguished fear to relapse. Here we show that fear relapse in rats limits single-unit activi...

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

authors： Giustino TF,Fitzgerald PJ,Ressler RL,Maren S

更新日期：2019-04-23 00:00:00

abstract：:Citizenship endows legal protections and is associated with economic and social gains for immigrants and their communities. In the United States, however, naturalization rates are relatively low. Yet we lack reliable knowledge as to what constrains immigrants from applying. Drawing on data from a public/private natura...

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

authors： Hainmueller J,Lawrence D,Gest J,Hotard M,Koslowski R,Laitin DD

更新日期：2018-01-30 00:00:00

abstract：:Confluent cultures of human fetal lung fibroblasts degrade approximately 10% of their newly synthesized collagen within the cell prior to secretion. This basal level of intracellular degradation could not be inhibited by colchicine or cytochalasin B, inhibitors of microtubular and microfilament function, respectively,...

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

authors： Berg RA,Schwartz ML,Crystal RG

更新日期：1980-08-01 00:00:00

abstract：:Protein kinase P (PK-P) activated by histones or certain other basic compounds has been purified previously from yeast [Yanagita, Y., Abdel-Ghany, M., Raden, D., Nelson, N. & Racker, E. (1987) Proc. Natl. Acad. Sci. USA 84, 925-929]. It is shown here that PK-P is present in solubilized membranes of A-431 carcinoma cel...

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

authors： Abdel-Ghany M,Kole HK,Racker E

更新日期：1987-12-01 00:00:00

abstract：:[Ala3-15N][Val1]Gramicidin A has been prepared by solid-phase peptide synthesis and studied by solid-state 15N nuclear magnetic resonance spectroscopy. The synthesis of desformyl[Ala3-15N][Val1]gramicidin A employed N-hydroxysuccinimide esters of 9-fluorenylmethoxycarbonyl-N alpha-amino acids and completely avoided th...

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

authors： Fields GB,Fields CG,Petefish J,Van Wart HE,Cross TA

更新日期：1988-03-01 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：:Phosphorylation of the regulatory (R) domain initiates cystic fibrosis transmembrane conductance regulator (CFTR) Cl(-) channel activity. To discover how the function of this domain is determined by its structure, we produced an R domain protein (R8) that spanned residues 708-831 of CFTR. Phosphorylated, but not unpho...

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

authors： Ostedgaard LS,Baldursson O,Vermeer DW,Welsh MJ,Robertson AD

更新日期：2000-05-09 00:00:00

abstract：:In mice, recent thymic emigrants (RTEs) make up a large part of the naïve T cell pool and have been suggested to be a distinct short-lived pool. In humans, however, the life span and number of RTEs are unknown. Although (2)H(2)O labeling in young mice showed high thymic-dependent daily naïve T cell production, long te...

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

authors： Vrisekoop N,den Braber I,de Boer AB,Ruiter AF,Ackermans MT,van der Crabben SN,Schrijver EH,Spierenburg G,Sauerwein HP,Hazenberg MD,de Boer RJ,Miedema F,Borghans JA,Tesselaar K

更新日期：2008-04-22 00:00:00

abstract：:A constitutively active form of mitogen-activated protein kinase kinase (MEK1) was synthesized under control of a zinc-inducible promoter in NIH 3T3 fibroblasts. Zinc treatment of serum-starved cells activated extracellular signal-regulated protein kinases (ERKs) and induced expression of cyclin D1. Newly synthesized ...

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

authors： Cheng M,Sexl V,Sherr CJ,Roussel MF

更新日期：1998-02-03 00:00:00

abstract：:Mutations of inversin cause type II nephronophthisis, an infantile autosomal recessive disease characterized by cystic kidney disease and developmental defects. Inversin regulates Wnt signaling and is required for convergent extension movements during early embryogenesis. We now show that Inversin is essential for Xen...

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

authors： Lienkamp S,Ganner A,Boehlke C,Schmidt T,Arnold SJ,Schäfer T,Romaker D,Schuler J,Hoff S,Powelske C,Eifler A,Krönig C,Bullerkotte A,Nitschke R,Kuehn EW,Kim E,Burkhardt H,Brox T,Ronneberger O,Gloy J,Walz G

更新日期：2010-11-23 00:00:00

abstract：:Hyperpolarization of substrates for magnetic resonance spectroscopy (MRS) and imaging (MRI) by dissolution dynamic nuclear polarization (D-DNP) usually involves saturating the ESR transitions of polarizing agents (PAs; e.g., persistent radicals embedded in frozen glassy matrices). This approach has shown enormous pote...

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

authors： Gajan D,Bornet A,Vuichoud B,Milani J,Melzi R,van Kalkeren HA,Veyre L,Thieuleux C,Conley MP,Grüning WR,Schwarzwälder M,Lesage A,Copéret C,Bodenhausen G,Emsley L,Jannin S

更新日期：2014-10-14 00:00:00

abstract：:Monoclonal antibodies (mAbs) against purified human placental insulin-like growth factor I (IGF-I) receptors were prepared and characterized. Three IgG mAbs were specific for the human IGF-I receptor and displayed negligible crossreactivity with the human insulin receptor. They stimulated 125I-labeled IGF-I (125I-IGF-...

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

authors： Xiong L,Kasuya J,Li SL,Kato J,Fujita-Yamaguchi Y

更新日期：1992-06-15 00:00:00

abstract：:Disulfide bonds have only rarely been found in intracellular proteins. That pattern is consistent with the chemically reducing environment inside the cells of well-studied organisms. However, recent experiments and new calculations based on genomic data of archaea provide striking contradictions to this pattern. Our r...

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

authors： Mallick P,Boutz DR,Eisenberg D,Yeates TO

更新日期：2002-07-23 00:00:00

abstract：:The induction of hemoglobin synthesis by dimethylsulfoxide in cells infected with Friend leukemia virus has been shown to depend on the number of cell divisions after the addition of the inducing agent. In asynchronous cultures the cells have a generation time of 24 hr, and hemoglobin synthesis occurs after 48 hr in t...

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

authors： McClintock PR,Papaconstantinou J

更新日期：1974-11-01 00:00:00

abstract：:Acid-sensing ion channels (ASICs) are neuronal non-voltage-gated cation channels that are activated when extracellular pH falls. They contribute to sensory function and nociception in the peripheral nervous system, and in the brain they contribute to synaptic plasticity and fear responses. Some of the physiologic cons...

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

authors： Petroff EY,Price MP,Snitsarev V,Gong H,Korovkina V,Abboud FM,Welsh MJ

更新日期：2008-02-26 00:00:00

abstract：:The "UV footprinting" technique has been used to detect contacts between EcoRI endonuclease and its recognition sequence at single nucleotide resolution. Comparison of the UV-footprinting results to the published crystal structure of the EcoRI endonuclease-DNA complex allows us to determine how UV light detects protei...

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

authors： Becker MM,Lesser D,Kurpiewski M,Baranger A,Jen-Jacobson L

更新日期：1988-09-01 00:00:00

abstract：:The Eemian (last interglacial, 130-115 ka) was likely the warmest of all interglacials of the last 800 ka, with summer Arctic temperatures 3-5 °C above present. Here, we present improved Eemian climate records from central Greenland, reconstructed from the base of the Greenland Ice Sheet Project 2 (GISP2) ice core. Ou...

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

authors： Yau AM,Bender ML,Robinson A,Brook EJ

更新日期：2016-08-30 00:00:00

abstract：:Treatment of quiescent cultures of mouse embryo-derived AKR-2B cells with transforming growth factor beta resulted in an early induction of c-sis mRNA. The increase in c-sis mRNA was followed by a corresponding increase in protein similar to platelet-derived growth factor (PDGF) in the culture medium. In addition, PDG...

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

authors： Leof EB,Proper JA,Goustin AS,Shipley GD,DiCorleto PE,Moses HL

更新日期：1986-04-01 00:00:00

abstract：:Cambodia, in which both Plasmodium vivax and Plasmodium falciparum are endemic, has been the focus of numerous malaria-control interventions, resulting in a marked decline in overall malaria incidence. Despite this decline, the number of P vivax cases has actually increased. To understand better the factors underlying...

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

authors： Parobek CM,Lin JT,Saunders DL,Barnett EJ,Lon C,Lanteri CA,Balasubramanian S,Brazeau N,DeConti DK,Garba DL,Meshnick SR,Spring MD,Chuor CM,Bailey JA,Juliano JJ

更新日期：2016-12-13 00:00:00

abstract：:Unrestrained 53BP1 activity at DNA double-strand breaks (DSBs) hampers DNA end resection and upsets DSB repair pathway choice. RNF169 acts as a molecular rheostat to limit 53BP1 deposition at DSBs, but how this fine balance translates to DSB repair control remains undefined. In striking contrast to 53BP1, ChIP analyse...

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

authors： An L,Dong C,Li J,Chen J,Yuan J,Huang J,Chan KM,Yu CH,Huen MSY

更新日期：2018-08-28 00:00:00

abstract：:Although much of the brain's functional organization is genetically predetermined, it appears that some noninnate functions can come to depend on dedicated and segregated neural tissue. In this paper, we describe a series of experiments that have investigated the neural development and organization of one such noninna...

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

authors： Polk TA,Farah MJ

更新日期：1998-02-03 00:00:00

abstract：:IL-7 and thymic stromal lymphopoietin (TSLP) are two major cytokines controlling murine B cell development. IL-7 has been studied extensively, but only recently has it become possible to unravel the role of TSLP in detail. We studied the biological activities of TSLP in B cell development at distinct ages in the mouse...

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

authors： Vosshenrich CA,Cumano A,Müller W,Di Santo JP,Vieira P

更新日期：2004-07-27 00:00:00

abstract：:A cDNA, cRKIN1, encoding a putative homologue of the yeast (Saccharomyces cerevisiae) SNF1-encoded protein-serine/threonine kinase, has been isolated from a library prepared from rye endosperm mRNA. Northern blot analysis demonstrated the presence of cRKIN1-related transcripts in developing endosperms but not in shoot...

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

authors： Alderson A,Sabelli PA,Dickinson JR,Cole D,Richardson M,Kreis M,Shewry PR,Halford NG

更新日期：1991-10-01 00:00:00

abstract：:The T-cell antigen receptor alpha-chain genes of an alloreactive, H-2Db-specific cytotoxic T-cell clone (3F9) are described. This study and our work on the 3F9 beta-chain genes reveal that the variable region gene segments for the alpha and beta chains expressed in 3F9 are identical to the ones used by a chicken eryth...

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

authors： Rupp F,Brecher J,Giedlin MA,Mosmann T,Zinkernagel RM,Hengartner H,Joho RH

更新日期：1987-01-01 00:00:00

abstract：:We report the crystal structure of a translation termination complex formed by the Thermus thermophilus 70S ribosome bound with release factor RF2, in response to a UAA stop codon, solved at 3 A resolution. The backbone of helix alpha5 and the side chain of serine of the conserved SPF motif of RF2 recognize U1 and A2 ...

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

authors： Korostelev A,Asahara H,Lancaster L,Laurberg M,Hirschi A,Zhu J,Trakhanov S,Scott WG,Noller HF

更新日期：2008-12-16 00:00:00