Phospholipase A2 group IIA expression in gastric adenocarcinoma is associated with prolonged survival and less frequent metastasis.

abstract：:Cell type in Saccharomyces yeasts is regulated by two transposable blocks of DNA, the a and alpha cassettes. There are three loci where either cassette can exist. At the HML and HMR loci the cassettes are not expressed. The cassette at the MAT locus is expressed and controls the cell type. Changes of cell type involve...

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

authors： Strathern JN,Spatola E,McGill C,Hicks JB

更新日期：1980-05-01 00:00:00

abstract：:Recent theory suggests that animals should switch facultatively among canonical movement modes as a complex function of internal state, landscape characteristics, motion capacity, and navigational capacity. We tested the generality of this paradigm for free-ranging elk (Cervus elaphus) over 5 orders of magnitude in ti...

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

authors： Fryxell JM,Hazell M,Börger L,Dalziel BD,Haydon DT,Morales JM,McIntosh T,Rosatte RC

更新日期：2008-12-09 00:00:00

abstract：:Biological resurfacing of entire articular surfaces represents an important but challenging strategy for treatment of cartilage degeneration that occurs in osteoarthritis. Not only does this approach require anatomically sized and functional engineered cartilage, but the inflammatory environment within an arthritic jo...

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

authors： Moutos FT,Glass KA,Compton SA,Ross AK,Gersbach CA,Guilak F,Estes BT

更新日期：2016-08-02 00:00:00

abstract：:A theoretical description of aqueous hydration in the minor groove of a B-form DNA is presented on the basis of a liquid-state Monte Carlo computer simulation on a system consisting of the oligonucleotide duplex d(CGCGAATTCGCG).d(GCGCTTAAGCGC) in a canonical B-form together with 1777 water molecules contained in a hex...

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

authors： Subramanian PS,Ravishanker G,Beveridge DL

更新日期：1988-03-01 00:00:00

abstract：:Competition for mates can be a major source of selection, not just on secondary sexual traits but across the genome. Mate competition strengthens selection on males via sexual selection, which typically favors healthy, vigorous individuals and, thus, all genetic variants that increase overall quality. However, recent ...

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

authors： Yun L,Chen PJ,Kwok KE,Angell CS,Rundle HD,Agrawal AF

更新日期：2018-06-26 00:00:00

abstract：:Natural ecosystems contain many individuals and species interacting with each other and with their abiotic environment. Such systems can be expected to exhibit complex dynamics in which small perturbations can be amplified to cause large changes. Here, we document the reorganization of an arid ecosystem that has occur...

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

authors： Brown JH,Valone TJ,Curtin CG

更新日期：1997-09-02 00:00:00

abstract：:Because of the insolubility and polymeric properties of amyloid fibrils, techniques used conventionally to analyze protein structure and dynamics have often been hampered. Ultrasonication can induce the monomeric solution of amyloidogenic proteins to form amyloid fibrils. However, ultrasonication can break down prefor...

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

authors： Chatani E,Lee YH,Yagi H,Yoshimura Y,Naiki H,Goto Y

更新日期：2009-07-07 00:00:00

abstract：:In a recently discovered class of oncogenes, GTPase-inhibiting mutations constitutively activate alpha subunits of signal-transducing guanine nucleotide-binding proteins (G proteins). Somatic mutations in a subclass of endocrine tumors are found in the arginine-179 codon of the alpha subunit of Gi2 (alpha i2), creatin...

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

authors： Pace AM,Wong YH,Bourne HR

更新日期：1991-08-15 00:00:00

abstract：:Toll-like receptors (TLRs) have been shown to participate in the recognition of pathogens by the innate immune system, but it is not clear how a restricted family of receptors has the capacity to recognize the wide spectrum of TLR stimuli known to exist. We report here that two members of the TLR family, TLR2 and TLR6...

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

authors： Ozinsky A,Underhill DM,Fontenot JD,Hajjar AM,Smith KD,Wilson CB,Schroeder L,Aderem A

更新日期：2000-12-05 00:00:00

abstract：:One signature of adaptive radiation is a high level of trait change early during the diversification process and a plateau toward the end of the radiation. Although the study of the tempo of evolution has historically been the domain of paleontologists, recently developed phylogenetic tools allow for the rigorous exam...

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

authors： Agrawal AA,Fishbein M,Halitschke R,Hastings AP,Rabosky DL,Rasmann S

更新日期：2009-10-27 00:00:00

abstract：:Polypeptide chains of 19 previously studied Escherichia coli aminoacyl-tRNA synthetases are as large as 951 amino acids and, depending on the enzyme, have quaternary structures of alpha, alpha 2, alpha 2 beta 2, and alpha 4. These enzymes have been organized into two classes which are defined by sequence motifs that a...

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

authors： Hou YM,Shiba K,Mottes C,Schimmel P

更新日期：1991-02-01 00:00:00

abstract：:Two photochromic activators of the electrogenic membrane of the electroplax of Electrophorus electricus are described. Trans-3,3'-bis[alpha-(trimethylammonium)methyl]azobenzene dibromide (Bis-Q), one of the most potent ever reported, is active at concentrations of less than 10(-7) M. Its cis isomer, which is obtained ...

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

authors： Bartels E,Wassermann NH,Erlanger BF

更新日期：1971-08-01 00:00:00

abstract：:Proliferating 3T3 mouse fibroblasts contain higher levels of the lectin carbohydrate-binding protein 35 (CBP35) than do quiescent cultures of the same cells. An immunofluorescence study was carried out with a rabbit antiserum directed against CBP35 to map the cellular fluorescence distribution in a large population of...

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

authors： Moutsatsos IK,Wade M,Schindler M,Wang JL

更新日期：1987-09-01 00:00:00

abstract：:Sera from 30 patients with astrocytoma were tested for antibody reacting with cell surface antigens of cultured autologous astrocytoma cells. Ten percent of the patients had antibody detectable by mixed hemadsorption assays, approximately 50% by immune adherence and protein A assays, and 100% by anti-C3-mixed hemadsor...

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

authors： Pfreundschuh M,Shiku H,Takahashi T,Ueda R,Ransohoff J,Oettgen HF,Old LJ

更新日期：1978-10-01 00:00:00

abstract：:Thioredoxin-related protein of 14 kDa (TRP14, also called TXNDC17 for thioredoxin domain containing 17, or TXNL5 for thioredoxin-like 5) is an evolutionarily well-conserved member of the thioredoxin (Trx)-fold protein family that lacks activity with classical Trx1 substrates. However, we discovered here that human TRP...

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

authors： Pader I,Sengupta R,Cebula M,Xu J,Lundberg JO,Holmgren A,Johansson K,Arnér ES

更新日期：2014-05-13 00:00:00

abstract：:The nature of color categories in the world's languages is contested. One major view holds that color categories are organized around universal focal colors, whereas an opposing view holds instead that categories are defined at their boundaries by linguistic convention. Both of these standardly opposed views are chall...

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

authors： Regier T,Kay P,Khetarpal N

更新日期：2007-01-23 00:00:00

abstract：:The absorption spectrum of an activesite specific chromophoric acyl enzyme, sturgeon beta-(2-furyl)-acryloyl-glyceraldehyde-3-phosphate dehydrogenase, is reported. This acyl enzyme undergoes all of the catalyzed reactions characteristic of the intermediate of the physiological acyl enzyme, 3-phospho-D-glyceroyl-glycer...

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

authors： Malhotra OP,Bernhard SA

更新日期：1973-07-01 00:00:00

abstract：:Duodenal bicarbonate secretion (DBS) is accepted as the primary mucosal defense against acid discharged from the stomach and is impaired in patients with duodenal ulcer disease. The secretory response to luminal acid is the main physiological stimulus for DBS and involves mediation by PGE2 produced by mucosal cells. T...

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

authors： Leppilampi M,Parkkila S,Karttunen T,Gut MO,Gros G,Sjöblom M

更新日期：2005-10-18 00:00:00

abstract：:The present investigation studied the influence of the blastocyst's state of activity on the "window" of implantation in the receptive uterus in the mouse. The receptive state of the uterus is defined as the limited time when the uterine milieu is favorable to blastocyst acceptance and implantation. In the mouse, impl...

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

authors： Paria BC,Huet-Hudson YM,Dey SK

更新日期：1993-11-01 00:00:00

abstract：:For many agronomically important plant genes, only their position on a genetic map is known. In the absence of an efficient transposon tagging system, such genes have to be isolated by map-based cloning. In bread wheat Triticum aestivum, the genome is hexaploid, has a size of 1.6 x 10(10) bp, and contains more than 80...

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

authors： Stein N,Feuillet C,Wicker T,Schlagenhauf E,Keller B

更新日期：2000-11-21 00:00:00

abstract：:γ-Secretase is an intramembrane-cleaving protease responsible for the generation of amyloid-β (Aβ) peptides. Recently, a series of compounds called γ-secretase modulators (GSMs) has been shown to decrease the levels of long toxic Aβ species (i.e., Aβ42), with a concomitant elevation of the production of shorter Aβ spe...

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

authors： Takeo K,Tanimura S,Shinoda T,Osawa S,Zahariev IK,Takegami N,Ishizuka-Katsura Y,Shinya N,Takagi-Niidome S,Tominaga A,Ohsawa N,Kimura-Someya T,Shirouzu M,Yokoshima S,Yokoyama S,Fukuyama T,Tomita T,Iwatsubo T

更新日期：2014-07-22 00:00:00

abstract：:Animals and plants use modified cell cycles to achieve particular developmental strategies. In one common example, most animals and plants have tissues in which the cells become polyploid or polytene by means of an S-G cycle, but the mechanism by which mitosis is inhibited in the endo cycle is not understood. The Dros...

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

authors： Kashevsky H,Wallace JA,Reed BH,Lai C,Hayashi-Hagihara A,Orr-Weaver TL

更新日期：2002-08-20 00:00:00

abstract：:Rad51 is the primary eukaryotic recombinase responsible for initiating DNA strand exchange during homologous recombination. Although the subject of intense study for over a decade, many molecular details of the reactions promoted by Rad51 and related recombinases remain unknown. Using total internal reflection fluores...

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

authors： Granéli A,Yeykal CC,Robertson RB,Greene EC

更新日期：2006-01-31 00:00:00

abstract：:Memory CD8 T cells provide durable protection against diverse intracellular pathogens and can be broadly segregated into distinct circulating and tissue-resident populations. Paradigmatic studies have demonstrated that circulating memory cells can be further divided into effector memory (Tem) and central memory (Tcm) ...

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

authors： Milner JJ,Nguyen H,Omilusik K,Reina-Campos M,Tsai M,Toma C,Delpoux A,Boland BS,Hedrick SM,Chang JT,Goldrath AW

更新日期：2020-10-13 00:00:00

abstract：:Glyoxalase I forms part of the glyoxalase pathway that detoxifies reactive aldehydes such as methylglyoxal, using the spontaneously formed glutathione hemithioacetal as substrate. All known eukaryotic enzymes contain zinc as their metal cofactor, whereas the Escherichia coli glyoxalase I contains nickel. Database mini...

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

authors： Vickers TJ,Greig N,Fairlamb AH

更新日期：2004-09-07 00:00:00

abstract：:Using short-term cultures of hamster embryo cells, we have examined the effects of the free-radical scavenger superoxide dismutase (superoxide:superoxide oxidoreductase, EC 1.15.1.1) and the enzyme catalase (hydrogen-peroxide:hydrogenperoxide oxidoreductase, EC 1.11.1.6) on x-ray- and bleomycin-induced transformation ...

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

authors： Borek C,Troll W

更新日期：1983-03-01 00:00:00

abstract：:Population expansion in space, or range expansion, is widespread in nature and in clinical settings. Space competition among heterogeneous subpopulations during range expansion is essential to population ecology, and it may involve the interplay of multiple factors, primarily growth and motility of individuals. Struct...

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

authors： Zuo W,Wu Y

更新日期：2020-03-03 00:00:00

abstract：:Recombinant full-length CD4 expressed in Spodoptera frugiperda 9 cells with the baculovirus system was electroinserted in erythrocyte (RBC) membranes. Of the inserted CD4, 70% was "correctly" oriented as shown by fluorescence quenching experiments with fluorescein-labeled CD4. The inserted CD4 displayed the same epito...

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

authors： Zeira M,Tosi PF,Mouneimne Y,Lazarte J,Sneed L,Volsky DJ,Nicolau C

更新日期：1991-05-15 00:00:00

abstract：:Accumulating evidence suggests that subcutaneous and visceral adipose tissues are differentially associated with metabolic disorders. In obesity, subcutaneous adipose tissue is beneficial for metabolic homeostasis because of repressed inflammation. However, the underlying mechanism remains unclear. Here, we demonstrat...

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

authors： Hwang I,Jo K,Shin KC,Kim JI,Ji Y,Park YJ,Park J,Jeon YG,Ka S,Suk S,Noh HL,Choe SS,Alfadda AA,Kim JK,Kim S,Kim JB

更新日期：2019-06-11 00:00:00

abstract：:During development, organisms acquire three-dimensional (3D) shapes with important physiological consequences. While basic mechanisms underlying morphogenesis are known in eukaryotes, it is often difficult to manipulate them in vivo. To circumvent this issue, here we present a study of developing Vibrio cholerae biofi...

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

authors： Fei C,Mao S,Yan J,Alert R,Stone HA,Bassler BL,Wingreen NS,Košmrlj A

更新日期：2020-04-07 00:00:00