Nucleosome organization of the yeast 2-micrometer DNA plasmid: a eukaryotic minichromosome.

abstract：:The rabbit kappa light chain gene family is characterized by the presence of two constant region (C kappa) genes; the C kappa 1 gene encodes the constant region of the principal rabbit immunoglobulin light chain, the C kappa 2 gene being not or very poorly expressed in domestic rabbits. There exist four major K1 allel...

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

authors： Akimenko MA,Mariamé B,Rougeon F

更新日期：1986-07-01 00:00:00

abstract：:The lymphocyte differentiation (Ly) antigen phenotype of cytotoxic effector T cells specific for H-2 mutant alloantigens was determined. Cytotoxic effectors generated in primary mixed lymphocyte culture and specific for H-2Kba and H-2Dda alloantigens are sensitive to both anti-Ly-1 and anti-Ly-2 serum plus complement....

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

authors： Wettstein PJ,Bailey DW,Mobraaten LE,Klein J,Frelinger JA

更新日期：1979-07-01 00:00:00

abstract：:Influenza virus infections cause a wide variety of outcomes, from mild disease to 3 to 5 million cases of severe illness and ∼290,000 to 645,000 deaths annually worldwide. The molecular mechanisms underlying these disparate outcomes are currently unknown. Glycosylation within the human host plays a critical role in in...

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

authors： Heindel DW,Koppolu S,Zhang Y,Kasper B,Meche L,Vaiana CA,Bissel SJ,Carter CE,Kelvin AA,Elaish M,Lopez-Orozco J,Zhang B,Zhou B,Chou TW,Lashua L,Hobman TC,Ross TM,Ghedin E,Mahal LK

更新日期：2020-10-27 00:00:00

abstract：:In this work, we report on studies of the nature of the dynamics and hydrophobic binding in cyclodextrins and human serum albumin protein complexes with orange II. With femtosecond time resolution, we examined the proton-transfer and trans-cis isomerization reactions of the ligand in these nanocavities and in pure sol...

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

authors： Douhal A,Sanz M,Tormo L

更新日期：2005-12-27 00:00:00

abstract：:Interpretation of empirical results based on a taxa's lifetime distribution shows apparently conflicting results. Species' lifetime is reported to be exponentially distributed, whereas higher-order taxa, such as families or genera, follow a broader distribution, compatible with power-law decay. We show that both forms...

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

authors： Pigolotti S,Flammini A,Marsili M,Maritan A

更新日期：2005-11-01 00:00:00

abstract：:A rapid and convenient method has been devised to determine the binding sites for proteins on RNA. The procedure is an adaptation of one used to map DNA-protein complexes by protection against nuclease digestion. The method uses the cytotoxic ribonuclease alpha-sarcin, which hydrolyzes purines in both single- and doub...

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

authors： Huber PW,Wool IG

更新日期：1984-01-01 00:00:00

abstract：:Membrane vesicles were extracted from etiolated and light-grown plants, a plant cell suspension culture, and an alga. Upon addition of ATP and Mg(2+), active Ca(2+) uptake into the vesicles against a concentration gradient was shown. The dependence of this uptake on ATP and Mg(2+) concentrations, pH, and temperature i...

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

authors： Gross J,Marmé D

更新日期：1978-03-01 00:00:00

abstract：:Interleukin 2 (IL-2)-deficient (IL-2-/-) mice develop hemolytic anemia and chronic inflammatory bowel disease. Importantly, the induction of disease in IL-2-deficient mice is critically dependent on CD4+ T cells. We have studied the requirements of T cells from IL-2-deficient mice for costimulation with B7 antigens. S...

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

authors： Razi-Wolf Z,Höllander GA,Reiser H

更新日期：1996-04-02 00:00:00

abstract：:During primate evolution, a major factor in lengthening life-span and decreasing age-specific cancer rates may have been improved protective mechanisms against oxygen radicals. We propose that one of these protective systems is plasma uric acid, the level of which increased markedly during primate evolution as a conse...

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

authors： Ames BN,Cathcart R,Schwiers E,Hochstein P

更新日期：1981-11-01 00:00:00

abstract：:Electron spectroscopic imaging, a new technique that permits the quantitative detection of the spatial distributions of atomic elements at high resolution, has been applied to the epiphyseal zone of hypertrophy in the mouse for the visualization of calcium, phosphorus, and sulfur. Longitudinally sectioned epiphyseal g...

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

authors： Arsenault AL,Ottensmeyer FP

更新日期：1983-03-01 00:00:00

abstract：:A flexible finite difference method is described that gives approximate solutions of linear elliptic partial differential equations, Lu = G, subject to general linear boundary conditions. The method gives high-order accuracy. The values of the unknown approximation function U are determined at mesh points by solving a...

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

authors： Lynch RE,Rice JR

更新日期：1978-06-01 00:00:00

abstract：:The type 6 secretion system (T6SS) is a nanomachine used by many Gram-negative bacteria, including Vibrio cholerae, to deliver toxic effector proteins into adjacent eukaryotic and bacterial cells. Because the activity of the T6SS is dependent on direct contact between cells, its activity is limited to bacteria growing...

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

authors： Toska J,Ho BT,Mekalanos JJ

更新日期：2018-07-31 00:00:00

abstract：:Sulfolobus turreted icosahedral virus (STIV) was isolated in acidic hot springs where it infects the archeon Sulfolobus solfataricus. We determined the STIV structure using near-atomic resolution electron microscopy and X-ray crystallography allowing tracing of structural polypeptide chains and visualization of transm...

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

authors： Veesler D,Ng TS,Sendamarai AK,Eilers BJ,Lawrence CM,Lok SM,Young MJ,Johnson JE,Fu CY

更新日期：2013-04-02 00:00:00

abstract：:The feasibility of long-term information storage by brain type II Ca2+/calmodulin-dependent protein kinase molecules is explored. Recent evidence indicates that this protein has switch-like properties. Equations are derived showing that a single kinase holoenzyme could form a bistable switch having the stability neces...

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

authors： Lisman JE,Goldring MA

更新日期：1988-07-01 00:00:00

abstract：:The plant Mentzelia pumila (family Loasaceae) has leaves and stems densely covered with tiny hooked trichomes. The structures entrap and kill insects and therefore are most probably protective. But they are also maladaptive in that they incapacitate a coccinellid beetle (Hippodamia convergens) that preys upon an aphid...

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

authors： Eisner T,Eisner M,Hoebeke ER

更新日期：1998-04-14 00:00:00

abstract：:Two cDNAs encoding two human receptors for retinoic acid (RA), RAR-alpha and RAR-beta, have been characterized recently. Synthetic peptides corresponding to the cDNA-deduced amino acid sequences unique to RAR-alpha and RAR-beta were used to generate anti-RAR-alpha antiserum (SP171) and anti-RAR-beta antisera (SP172 an...

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

authors： Gaub MP,Lutz Y,Ruberte E,Petkovich M,Brand N,Chambon P

更新日期：1989-05-01 00:00:00

abstract：:There has been an increasing interest in cyanobacteria because these photosynthetic organisms convert solar energy into biomass and because of their potential for the production of biofuels. However, the exploitation of cyanobacteria for bioengineering requires knowledge of their transcriptional organization. Using di...

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

authors： Mitschke J,Georg J,Scholz I,Sharma CM,Dienst D,Bantscheff J,Voss B,Steglich C,Wilde A,Vogel J,Hess WR

更新日期：2011-02-01 00:00:00

abstract：:The sequences of large insert clones containing genomic DNA that is orthologous to the maize adh1 region were obtained for sorghum, rice, and the adh1-homoeologous region of maize, a remnant of the tetraploid history of the Zea lineage. By using all four genomes, it was possible to describe the nature, timing, and lin...

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

authors： Ilic K,SanMiguel PJ,Bennetzen JL

更新日期：2003-10-14 00:00:00

abstract：:Although the applicability of small subunit ribosomal RNA (16S rRNA) sequences for bacterial classification is now well accepted, the general use of these molecules has been hindered by the technical difficulty of obtaining their sequences. A protocol is described for rapidly generating large blocks of 16S rRNA sequen...

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

authors： Lane DJ,Pace B,Olsen GJ,Stahl DA,Sogin ML,Pace NR

更新日期：1985-10-01 00:00:00

abstract：:Whole-cell and single-channel recording techniques were used to study the action of the anticonvulsant drug MK-801 [(+)-5-methyl-10,11-dihydro-5H-dibenzo[a,d]- cyclohepten-5,10-imine maleate) on responses to excitatory amino acids in rat neocortical neurons in cell culture. MK-801 caused a progressive, long-lasting bl...

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

authors： Huettner JE,Bean BP

更新日期：1988-02-01 00:00:00

abstract：:Phospholamban (PLN) is an effective inhibitor of the sarco(endo)plasmic reticulum Ca(2+) ATPase (SERCA). Here, we examined PLN stability and degradation in primary cultured mouse neonatal cardiomyocytes (CMNCs) and mouse hearts using immunoblotting, molecular imaging, and [(35)S]methionine pulse-chase experiments, tog...

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

authors： Teng AC,Miyake T,Yokoe S,Zhang L,Rezende LM Jr,Sharma P,MacLennan DH,Liu PP,Gramolini AO

更新日期：2015-06-09 00:00:00

abstract：:Experiments were designed to determine the interrelationship between cyclic AMP and Ca(2+) during the processes of sperm capacitation and the acrosome reaction. In minimal culture media containing pyruvate and lactate as substrates, guinea pig spermatozoa required a minimum of 1.0-1.5 hr to capacitate in the presence ...

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

authors： Hyne RV,Garbers DL

更新日期：1979-11-01 00:00:00

abstract：:Apis mellifera originated in Africa and extended its range into Eurasia in two or more ancient expansions. In 1956, honey bees of African origin were introduced into South America, their descendents admixing with previously introduced European bees, giving rise to the highly invasive and economically devastating "Afri...

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

authors： Zayed A,Whitfield CW

更新日期：2008-03-04 00:00:00

abstract：:It is widely accepted that the heavily glycosylated glycoprotein gp120 on the surface of HIV-1 shields peptide epitopes from recognition by the immune system and may promote infection in vivo by interaction with dendritic cells and transport to tissue rich in CD4(+) T cells such as lymph nodes. A conserved cluster of ...

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

authors： Wang SK,Liang PH,Astronomo RD,Hsu TL,Hsieh SL,Burton DR,Wong CH

更新日期：2008-03-11 00:00:00

abstract：:The deadly symptoms of malaria occur as Plasmodium parasites replicate within blood cells. Members of several variant surface protein families are expressed on infected blood cell surfaces. Of these, the largest and most ubiquitous are the Plasmodium-interspersed repeat (PIR) proteins, with more than 1,000 variants in...

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

authors： Harrison TE,Reid AJ,Cunningham D,Langhorne J,Higgins MK

更新日期：2020-12-15 00:00:00

abstract：:We have explored the mechanism of genomic rearrangement in a hamster fibroblast cell culture system in which rearrangements are induced 5' to the endogenous thymidine kinase gene by chemical carcinogen treatment. The wild-type region around one rearrangement breakpoint was cloned and sequenced. With this sequence info...

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

authors： Barr FG,Davis RJ,Eichenfield L,Emanuel BS

更新日期：1992-02-01 00:00:00

abstract：:Since at least T. H. Marshall, scholars have recognized military service as a form of sacrifice that warrants compensation from the state. War-widow pensions, expansion of the franchise, and subsidized higher education are all examples of rights and benefits "bestowed" in return for wartime mobilization. Similarly, in...

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

authors： Johnson T,Conley D

更新日期：2019-10-22 00:00:00

abstract：:P transposable elements in Drosophila are mobilized via a cut-and-paste mechanism. The broken DNA ends generated during transposition can be repaired via the homology-directed synthesis-dependent strand annealing or by nonhomologous end joining (NHEJ). Genetic studies have demonstrated an interaction between the gene ...

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

authors： Min B,Weinert BT,Rio DC

更新日期：2004-06-15 00:00:00

abstract：:We present here a brief review of direct force measurements between hydrophobic surfaces in aqueous solutions. For almost 70 years, researchers have attempted to understand the hydrophobic effect (the low solubility of hydrophobic solutes in water) and the hydrophobic interaction or force (the unusually strong attract...

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

authors： Meyer EE,Rosenberg KJ,Israelachvili J

更新日期：2006-10-24 00:00:00

abstract：:To study the role of low-abundance, embryonic muscle-specific gene transcripts, we have developed a method to screen cDNA clones from embryonic muscle for such sequences. The protocol involves two stages: first, partial enrichment for cDNA clones carrying possible embryo-specific sequences by selecting clones of low-a...

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

authors： Ordahl CP,Kioussis D,Tilghman SM,Ovitt CE,Fornwald J

更新日期：1980-08-01 00:00:00