Communication between oocytes and somatic cells regulates volatile pheromone production in Caenorhabditis elegans.

abstract：:The x-ray sensitive hamster cell line xrs-6 is deficient in DNA double-strand break (DSB) repair and exhibits impaired V(D)J recombination. The molecular defect in this line is in the 80-kDa subunit of the Ku autoantigen, a protein that binds to DNA ends and recruits the DNA-dependent protein kinase to DNA. Using an I...

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

authors： Liang F,Romanienko PJ,Weaver DT,Jeggo PA,Jasin M

更新日期：1996-08-20 00:00:00

abstract：:It was proved that the protoplasts prepared from mesophyll of Nicotiana tabacum are infected by tobacco mosaic virus. The infection occurred when purified tobacco mosaic virus particles were added to a protoplast suspension in the presence of poly-L-ornithine. The virus multiplied in these protoplasts to a level of 10...

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

authors： Takebe I,Otsuki Y

更新日期：1969-11-01 00:00:00

abstract：:Methylation on lysine 9 of histone H3 (H3K9me) and DNA methylation play important roles in the transcriptional silencing of specific genes and repetitive elements. Both marks are detected on class I and II endogenous retroviruses (ERVs) in murine embryonic stem cells (mESCs). Recently, we reported that the H3K9-specif...

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

authors： Leung DC,Dong KB,Maksakova IA,Goyal P,Appanah R,Lee S,Tachibana M,Shinkai Y,Lehnertz B,Mager DL,Rossi F,Lorincz MC

更新日期：2011-04-05 00:00:00

abstract：:The chimaeric protein repressor-galactosidase, in which fully active lac repressor is covalently linked to the active enzyme beta-galactosidase, was used as a system for probing the quaternary structure of lac repressor. Electron micrographs revealed repressor-galactosidase to be a tetrameric aggregate. When lac repre...

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

authors： Kania J,Brown DT

更新日期：1976-10-01 00:00:00

abstract：:Understanding the mechanisms of Salmonella virulence is an important challenge. The capacity of this intracellular bacterial pathogen to cause diseases depends on the expression of virulence factors including the second type III secretion system (TTSS-2), which is used to translocate into the eukaryotic cytosol a set ...

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

authors： Henry T,Couillault C,Rockenfeller P,Boucrot E,Dumont A,Schroeder N,Hermant A,Knodler LA,Lecine P,Steele-Mortimer O,Borg JP,Gorvel JP,Méresse S

更新日期：2006-09-05 00:00:00

abstract：:We present a unique proxy for the reconstruction of variation in precipitation over the Amazon: oxygen isotope ratios in annual rings in tropical cedar (Cedrela odorata). A century-long record from northern Bolivia shows that tree rings preserve the signal of oxygen isotopes in precipitation during the wet season, wit...

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

authors： Brienen RJ,Helle G,Pons TL,Guyot JL,Gloor M

更新日期：2012-10-16 00:00:00

abstract：:Using a novel technique of modulated photo-dissociation of carbon monoxide from hemoglobin, we have obtained the rates for conversion between the two quaternary states, R, and T, at 3-fold ligation. Our measurements at pH 7 and 22 degrees give rates of 780 +/- 40 sec-1 for going from R to T, and 2500 +/- 200 sec-1 fro...

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

authors： Ferrone FA,Hopfield JJ

更新日期：1976-12-01 00:00:00

abstract：:We have used (13C)-1H NMR spectroscopy at 360.13 MHz to resolve the 13C coupled proton resonance of glutamate and lactate in the rat brain in vivo. The time required for the 13C fractional enrichment of the 4-CH2 position of brain glutamate to reach isotopic steady state was determined during a continuous infusion of ...

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

authors： Rothman DL,Behar KL,Hetherington HP,den Hollander JA,Bendall MR,Petroff OA,Shulman RG

更新日期：1985-03-01 00:00:00

abstract：:We have constructed bovine papilloma virus recombinants carrying a hybrid gene in which human growth hormone structural sequences are fused to the promoter and presumptive control region of the mouse metallothionein-I gene. Mouse cells transformed with the recombinants synthesize metallothionein-growth hormone hybrid ...

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

authors： Pavlakis GN,Hamer DH

更新日期：1983-01-01 00:00:00

abstract：:The POT1 (protection of telomeres 1) protein binds the ssDNA overhangs at the ends of chromosomes in diverse eukaryotes. POT1 is essential for chromosome end-protection, as best demonstrated in fission yeast. In human cells, hPOT1 is also involved in telomere-length regulation. We now show that telomeric oligonucleoti...

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

authors： Zaug AJ,Podell ER,Cech TR

更新日期：2005-08-02 00:00:00

abstract：:In most genome-wide linkage studies, implication of a causative disease gene often requires years of expanding the study to more families and finer mapping of the initially described region. Even after such efforts, unobtainable sample sizes can be required to make statistically meaningful conclusions about a single g...

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

authors： Antinozzi PA,Garcia-Diaz A,Hu C,Rothman JE

更新日期：2006-03-07 00:00:00

abstract：:The immunity protein to colicin A (Cai), which is constitutively expressed at a very low level in Escherichia coli strains, has been studied in recombinant plasmid constructs allowing expression of various immunity fusion proteins under the control of inducible promoters. The 13-amino acid NH2-terminal region of Cai w...

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

authors： Geli V,Baty D,Lazdunski C

更新日期：1988-02-01 00:00:00

abstract：:In adipocytes, adenylate cyclase is positively regulated by beta-adrenergic agents and negatively regulated by adenosine. Incubation of adipocytes with adenosine deaminase relieves the inhibition of adenylate cyclase by destroying the adenosine that the cells release into the medium. When adipocytes are incubated with...

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

authors： Chung FZ,Weber HW,Appleman MM

更新日期：1985-03-01 00:00:00

abstract：:The effective management of marine fisheries is an ongoing challenge at the intersection of biology, economics, and policy. One way in which fish stocks-and their habitats-can be protected is through the establishment of marine reserves, areas that are closed to fishing. Although the potential economic benefits of suc...

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

authors： Herrera GE,Moeller HV,Neubert MG

更新日期：2016-04-05 00:00:00

abstract：:The multifunctional Ca2+/calmodulin-dependent protein kinase purified from rat brain cytosol undergoes an intramolecular self-phosphorylation or autophosphorylation. Autophosphorylation produces two strikingly different effects on kinase activity that are dependent on the level of ATP used in the reaction. At low but ...

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

authors： Lou LL,Lloyd SJ,Schulman H

更新日期：1986-12-01 00:00:00

abstract：:The peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) is a transcriptional coactivator that controls expression of metabolic/energetic genes, programming cellular responses to nutrient and environmental adaptations such as fasting, cold, or exercise. Unlike other coactivators, PGC-1α contai...

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

authors： Tavares CDJ,Aigner S,Sharabi K,Sathe S,Mutlu B,Yeo GW,Puigserver P

更新日期：2020-09-08 00:00:00

abstract：:The accumulation of metal ions and amyloid-β (Aβ) aggregates found in the brain of patients with Alzheimer's disease (AD) has been suggested to be involved in AD pathogenesis. To investigate metal-Aβ-associated pathways in AD, development of chemical tools to target metal-Aβ species is desired. Only a few efforts, how...

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

authors： Choi JS,Braymer JJ,Nanga RP,Ramamoorthy A,Lim MH

更新日期：2010-12-21 00:00:00

abstract：:Collective intelligence refers to the ability of groups to outperform individual decision makers when solving complex cognitive problems. Despite its potential to revolutionize decision making in a wide range of domains, including medical, economic, and political decision making, at present, little is known about the ...

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

authors： Kurvers RH,Herzog SM,Hertwig R,Krause J,Carney PA,Bogart A,Argenziano G,Zalaudek I,Wolf M

更新日期：2016-08-02 00:00:00

abstract：:The intracellular localization of phytochrome was seen in dark-grown oat (Avena sativa L., cv. Garry) and rice (Oryza sativa L., cv. unknown) shoots after various light treatments using an indirect peroxidase-antiperoxidase antibody labeling method. Phytochrome is generally distributed throughout the cytoplasm in cell...

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

authors： Mackenzie JM Jr,Coleman RA,Briggs WR,Pratt LH

更新日期：1975-03-01 00:00:00

abstract：:TIM-4, a member of the TIM family expressed on antigen-presenting cells, binds to phosphatidylserine exposed on the surface of apoptotic bodies. However, the significance of this interaction in vivo remains unknown because other receptors have been implicated in the clearance of apoptotic bodies and could compensate f...

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

authors： Rodriguez-Manzanet R,Sanjuan MA,Wu HY,Quintana FJ,Xiao S,Anderson AC,Weiner HL,Green DR,Kuchroo VK

更新日期：2010-05-11 00:00:00

abstract：:Ultraviolet (UV)-stimulated nonconservative DNA synthesis has been observed in E. coli rendered permeable to nucleoside triphosphates by exposure to toluene. This synthesis is detected in toluenized cells in which the background of UV-independent DNA synthesis is reduced by use of dnaB mutants temperature-sensitive fo...

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

authors： Masker WE,Hanawalt PC

更新日期：1973-01-01 00:00:00

abstract：:This paper presents insights and action proposals to better harness technological innovation for sustainable development. We begin with three key insights from scholarship and practice. First, technological innovation processes do not follow a set sequence but rather emerge from complex adaptive systems involving many...

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

authors： Anadon LD,Chan G,Harley AG,Matus K,Moon S,Murthy SL,Clark WC

更新日期：2016-08-30 00:00:00

abstract：:Livers of a natural population of winter flounder from a contaminated site in Boston Harbor were examined for the presence of oncogenes by transfection of DNA into NIH 3T3 mouse fibroblasts. Tissues analyzed contained histopathologic lesions including abnormal vacuolation, biliary proliferation, and, in many cases, he...

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

authors： McMahon G,Huber LJ,Moore MJ,Stegeman JJ,Wogan GN

更新日期：1990-01-01 00:00:00

abstract：:The ionophores A23187 and bromolasalocid (Br-X537A) acted synergistically in translocating Ca(2+) from an aqueous into an organic immiscible phase or in mediating Ca(2+) transport across the organic phase, the effects obtained in the simultaneous presence of both ionophores being greater than those expected from a sum...

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

authors： Deleers M,Gelbcke M,Malaisse WJ

更新日期：1981-01-01 00:00:00

abstract：:The Met mutant of Drosophila melanogaster is highly resistant to juvenile hormone III (JH III) or its chemical analog, methoprene, an insect growth regulator. Five major mechanisms of insecticide resistance were examined in Met and susceptible Met+ flies. These two strains showed only minor differences when penetratio...

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

authors： Shemshedini L,Wilson TG

更新日期：1990-03-01 00:00:00

abstract：:Y chromosomes are different from other chromosomes because of a lack of recombination. Until now, complete sequence information of Y chromosomes has been available only for some primates, although considerable information is available for other organisms, e.g., several species of Drosophila. Here, we report the gene o...

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

authors： Yamato KT,Ishizaki K,Fujisawa M,Okada S,Nakayama S,Fujishita M,Bando H,Yodoya K,Hayashi K,Bando T,Hasumi A,Nishio T,Sakata R,Yamamoto M,Yamaki A,Kajikawa M,Yamano T,Nishide T,Choi SH,Shimizu-Ueda Y,Hanajiri T,Sa

更新日期：2007-04-10 00:00:00

abstract：:Artificial two-dimensional biological habitats were prepared from porous polymer layers and inoculated with the fungus Penicillium roqueforti to provide a living material. Such composites of classical industrial ingredients and living microorganisms can provide a novel form of functional or smart materials with capabi...

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

authors： Gerber LC,Koehler FM,Grass RN,Stark WJ

更新日期：2012-01-03 00:00:00

abstract：:The Amazon rainforest is the Earth's largest reservoir of plant and animal diversity, and it has been subjected to especially high rates of land use change, primarily to cattle pasture. This conversion has had a strongly negative effect on biological diversity, reducing the number of plant and animal species and homog...

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

authors： Rodrigues JL,Pellizari VH,Mueller R,Baek K,Jesus Eda C,Paula FS,Mirza B,Hamaoui GS Jr,Tsai SM,Feigl B,Tiedje JM,Bohannan BJ,Nüsslein K

更新日期：2013-01-15 00:00:00

abstract：:Although sexual selection theory has proved successful in explaining a wide array of male ornaments, the function of ornaments occurring in females is largely unknown. Traditionally, female ornaments have been considered nonfunctional, being merely a genetically correlated response to selection for male ornamentation....

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

authors： Amundsen T,Forsgren E

更新日期：2001-11-06 00:00:00

abstract：:Transformation promotes genome plasticity in bacteria via RecA-driven homologous recombination. In the gram-positive human pathogen Streptococcus pneumoniae, the transformasome a multiprotein complex, internalizes, protects, and processes transforming DNA to generate chromosomal recombinants. Double-stranded DNA is in...

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

authors： Quevillon-Cheruel S,Campo N,Mirouze N,Mortier-Barrière I,Brooks MA,Boudes M,Durand D,Soulet AL,Lisboa J,Noirot P,Martin B,van Tilbeurgh H,Noirot-Gros MF,Claverys JP,Polard P

更新日期：2012-09-11 00:00:00