Unusual structure of geranium chloroplast DNA: A triple-sized inverted repeat, extensive gene duplications, multiple inversions, and two repeat families.

abstract：:Commensal and pathogenic bacteria must deal with many different stress conditions to survive in and colonize the human gastrointestinal tract. One major challenge that bacteria encounter in the gut is the high concentration of bile salts, which not only aid in food absorption but also act as effective physiological an...

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

authors： Cremers CM,Knoefler D,Vitvitsky V,Banerjee R,Jakob U

更新日期：2014-04-22 00:00:00

abstract：:A polypeptide was isolated from acid extracts of porcine hypothalami on the basis of its high ability to stimulate the release of corticotropin from superfused rat pituitary cells. After an initial separation by gel filtration on Sephadex G-25, further purification was carried out by reversed-phase HPLC. The isolated ...

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

authors： Patthy M,Horvath J,Mason-Garcia M,Szoke B,Schlesinger DH,Schally AV

更新日期：1985-12-01 00:00:00

abstract：:Communities have an important role to play in biodiversity conservation. However, community-based conservation as a panacea, like government-based conservation as a panacea, ignores the necessity of managing commons at multiple levels, with vertical and horizontal interplay among institutions. The study of conservatio...

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

authors： Berkes F

更新日期：2007-09-25 00:00:00

abstract：:Various enzymatic derivatives of the murine myeloma protein IgA(MOPC-315) were subjected to hapten-binding quantitation and circular dichroic analysis in an attempt to ascertain the structural localization and functional definition of the immunoglobulin active site. The extrinsic Cotton effects observed with near satu...

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

authors： Merz DC,Litman GW,Good RA

更新日期：1974-05-01 00:00:00

abstract：:Nitrogenase is an ATP-requiring enzyme capable of carrying out multielectron reductions of inert molecules. A purified remodeled nitrogenase containing two amino acid substitutions near the site of its FeMo cofactor was recently described as having the capacity to reduce carbon dioxide (CO2) to methane (CH4). Here, we...

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

authors： Fixen KR,Zheng Y,Harris DF,Shaw S,Yang ZY,Dean DR,Seefeldt LC,Harwood CS

更新日期：2016-09-06 00:00:00

abstract：:How cells achieve their final sizes is a pervasive biological question. One strategy to increase cell size is for the cell to amplify its chromosomal DNA content through endoreduplication cycles. Although endoreduplication is widespread in eukaryotes, we know very little about its molecular mechanisms. Successful prog...

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

authors： Sugimoto-Shirasu K,Roberts GR,Stacey NJ,McCann MC,Maxwell A,Roberts K

更新日期：2005-12-20 00:00:00

abstract：:Skeletal muscle L-type Ca2+ channels respond to trains of brief depolarizations with a strong shift of the voltage dependence of channel activation toward more negative membrane potentials and slowing of channel deactivation. Increased Ca2+ entry resulting from this potentiation of channel activity may increase contra...

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

authors： Johnson BD,Scheuer T,Catterall WA

更新日期：1994-11-22 00:00:00

abstract：:The p2b domain of Rous sarcoma virus (RSV) Gag and the p6 domain of HIV-1 Gag contain late assembly (L) domains that engage the ESCRT membrane fission machinery and are essential for virus release. We now show that the PPXY-type RSV L domain specifically recruits the BAR domain protein PACSIN2 into virus-like particle...

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

authors： Popov S,Popova E,Inoue M,Wu Y,Göttlinger H

更新日期：2018-07-03 00:00:00

abstract：:In an fMRI experiment, participants were exposed to narratives based on true stories designed to evoke admiration and compassion in 4 distinct categories: admiration for virtue (AV), admiration for skill (AS), compassion for social/psychological pain (CSP), and compassion for physical pain (CPP). The goal was to test ...

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

authors： Immordino-Yang MH,McColl A,Damasio H,Damasio A

更新日期：2009-05-12 00:00:00

abstract：:Integrated single-crystal-like small and wide-angle X-ray diffraction images of a CdSe nanosheet under pressure provide direct experimental evidence for the detailed pathway of transformation of the CdSe from a wurtzite to a rock-salt structure. Two consecutive planar atomic slips [(001) {110} in parallel and (102) {1...

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

authors： Wang Z,Wen XD,Hoffmann R,Son JS,Li R,Fang CC,Smilgies DM,Hyeon T

更新日期：2010-10-05 00:00:00

abstract：:Oligodeoxyribonucleotides covalently linked to an intercalating agent via a polymethylene linker were synthesized. Oligothymidylates attached to an acridine dye (Acr) through the 3'-phosphate group [(Tp)n(CH2) mAcr ] specifically interact with the complementary sequence. The interaction is strongly stabilized by the i...

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

authors： Asseline U,Delarue M,Lancelot G,Toulmé F,Thuong NT,Montenay-Garestier T,Hélène C

更新日期：1984-06-01 00:00:00

abstract：:Exocytosis allows the release of secretory products and the delivery of new membrane material to the plasma membrane. So far, little is known about the underlying molecular mechanism and its control in plant cells. We have used the whole-cell patch-clamp technique to monitor changes in membrane capacitance to study ex...

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

authors： Homann U,Tester M

更新日期：1997-06-10 00:00:00

abstract：:Binding of a partial proteolytic digest by V8 enzyme of the yeast site-specific recombinase Flp to its target site gives rise to DNA-protein complexes that are smaller than those produced by the full-sized protein. The smallest of these complexes (occupancy of one peptide monomer per site) contains either one of two p...

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

authors： Chen JW,Evans BR,Yang SH,Teplow DB,Jayaram M

更新日期：1991-07-15 00:00:00

abstract：:Mature larvae of Sarcophaga argyrostoma fail to form puparia when kept in contact with water, but pupariate after having been subsequently exposed to dryness for 30 hr. They become increasingly more sensitive to injected ecdysone the longer the exposure to dry conditions. A second wet treatment halts the production of...

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

authors： Zdarek J,Fraenkel G

更新日期：1970-09-01 00:00:00

abstract：:PCR was used to isolate nucleotide sequences that may encode novel members of the neuropeptide Y receptor family. By use of a PCR product as a hybridization probe, a full-length human cDNA was isolated that encodes a 375-aa protein with a predicted membrane topology identifying it as a member of the G-protein-coupled ...

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

authors： Yan H,Yang J,Marasco J,Yamaguchi K,Brenner S,Collins F,Karbon W

更新日期：1996-05-14 00:00:00

abstract：:The β-1,3-glucan chrysolaminarin is the main storage polysaccharide of diatoms. In contrast to plants and green algae, diatoms and most other algal groups do not accumulate storage polysaccharides in their plastids. The diatom Phaeodactylum tricornutum possesses only a single gene encoding a putative β-1,3-glucan synt...

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

authors： Huang W,Haferkamp I,Lepetit B,Molchanova M,Hou S,Jeblick W,Río Bártulos C,Kroth PG

更新日期：2018-05-01 00:00:00

abstract：:The Cu,Zn superoxide dismutase (SOD) was examined earlier and found to behave in a very unclock-like manner despite (accepted point mutation, or PAM) corrections for multiple replacements per site. Depending upon the time span involved, rates could differ 5-fold. We have sought to determine whether the data might be c...

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

authors： Fitch WM,Ayala FJ

更新日期：1994-07-19 00:00:00

abstract：:Multiple biological processes involve the stretching of nucleic acids (NAs). Stretching forces induce local changes in the molecule structure, inhibiting or promoting the binding of proteins, which ultimately affects their functionality. Understanding how a force induces changes in the structure of NAs at the atomic l...

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

authors： Marin-Gonzalez A,Vilhena JG,Perez R,Moreno-Herrero F

更新日期：2017-07-03 00:00:00

abstract：:Group II intron RNAs self-splice in vitro but only at high salt and/or Mg2+ concentrations and have been thought to require proteins to stabilize their active structure for efficient splicing in vivo. Here, we show that a DEAD-box protein, CYT-19, can by itself promote the splicing and reverse splicing of the yeast aI...

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

authors： Mohr S,Matsuura M,Perlman PS,Lambowitz AM

更新日期：2006-03-07 00:00:00

abstract：:Protective immunity against human schistosome infection develops slowly, for reasons that are not yet fully understood. For many decades, researchers have attempted to infer properties of the immune response from epidemiological studies, with mathematical models frequently being used to bridge the gap between immunolo...

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

authors： Mitchell KM,Mutapi F,Savill NJ,Woolhouse ME

更新日期：2012-08-14 00:00:00

abstract：:Stimulation of catecholamine release was studied in the isolated adrenal of the cat during retrograde perfusion. Theophylline, adenosine 3':5'-cyclic monophosphate (cyclic AMP), and dibutyryl-cyclic AMP stimulated catecholamine release in adrenal chromaffin tissue; adenosine, 2'-AMP, 3'-AMP, and 5'-AMP were ineffectiv...

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

authors： Peach MJ

更新日期：1972-04-01 00:00:00

abstract：:Tumor-derived adhesion factor (TAF) was previously identified as a cell adhesion molecule secreted by human bladder carcinoma cell line EJ-1. To elucidate the physiological function of TAF, we examined its distribution in human normal and tumor tissues. Immunochemical staining with an anti-TAF monoclonal antibody show...

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

authors： Akaogi K,Okabe Y,Sato J,Nagashima Y,Yasumitsu H,Sugahara K,Miyazaki K

更新日期：1996-08-06 00:00:00

abstract：:Bacteriorhodopsin from Halobacterium halobium has been solubilized in the nonionic detergent Triton X-100. The circular dichroic spectrum and hydrodynamic properties indicate that the structure of this protein in the detergent is not significantly altered from that of the native membrane-bound form. Bacteriorhodopsin ...

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

authors： Reyenolds JA,Stoeckenius W

更新日期：1977-07-01 00:00:00

abstract：:Functional lysosomes mediate autophagy and macropinocytosis for nutrient acquisition. Pancreatic ductal adenocarcinoma (PDAC) tumors exhibit high basal lysosomal activity, and inhibition of lysosome function suppresses PDAC cell proliferation and tumor growth. However, the codependencies induced by lysosomal inhibitio...

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

authors： Elliott IA,Dann AM,Xu S,Kim SS,Abt ER,Kim W,Poddar S,Moore A,Zhou L,Williams JL,Capri JR,Ghukasyan R,Matsumura C,Tucker DA,Armstrong WR,Cabebe AE,Wu N,Li L,Le TM,Radu CG,Donahue TR

更新日期：2019-04-02 00:00:00

abstract：:The circadian hormone melatonin is synthesized predominantly in the pineal gland by the actions of two pineal-specific enzymes: serotonin N-acetyltransferase (NAT) and hydroxyindole-O-methyltransferase (HIOMT). Pineal night-specific ATPase (PINA), another pineal- and night-specific protein we recently identified, is p...

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

authors： Li X,Chen S,Wang Q,Zack DJ,Snyder SH,Borjigin J

更新日期：1998-02-17 00:00:00

abstract：:Three types of protein kinase C were purified from rabbit brain cytosol. Each type has a molecular mass of approximately 80 kDa and serves as a receptor for phorbol esters. Polyclonal antibodies produced to two protein kinase C types were relatively type-specific, indicating that these proteins have unique antigenic d...

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

authors： Jaken S,Kiley SC

更新日期：1987-07-01 00:00:00

abstract：:Infection with avian influenza A virus of the H5N1 subtype (isolates A/HK/212/03 and A/HK/213/03) was fatal to one of two members of a family in southern China in 2003. This incident was preceded by lethal outbreaks of H5N1 influenza in waterfowl, which are the natural hosts of these viruses and, therefore, normally h...

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

authors： Guan Y,Poon LL,Cheung CY,Ellis TM,Lim W,Lipatov AS,Chan KH,Sturm-Ramirez KM,Cheung CL,Leung YH,Yuen KY,Webster RG,Peiris JS

更新日期：2004-05-25 00:00:00

abstract：:Based on the hypothesis that features of the molecular program of normal wound healing might play an important role in cancer metastasis, we previously identified consistent features in the transcriptional response of normal fibroblasts to serum, and used this "wound-response signature" to reveal links between wound h...

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

authors： Chang HY,Nuyten DS,Sneddon JB,Hastie T,Tibshirani R,Sørlie T,Dai H,He YD,van't Veer LJ,Bartelink H,van de Rijn M,Brown PO,van de Vijver MJ

更新日期：2005-03-08 00:00:00

abstract：:Two strains that overproduce endonuclease III were found in a colony bank containing hybrid ColE1-Escherichia coli plasmids. The enzyme was identified in crude extracts by the degradation of partially depyrimidinated DNA in the presence of EDTA, by its sedimentation velocity, and by its associated thymine glycol-DNA g...

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

authors： Cunningham RP,Weiss B

更新日期：1985-01-01 00:00:00

abstract：:Although it has been known for decades that the tight junctions of fluid-transporting epithelia are leaky to ions, it has not been possible to determine directly whether significant transjunctional water movement also occurs. An optical microscopic technique was developed for the direct visualization of the flow veloc...

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

authors： Kovbasnjuk O,Leader JP,Weinstein AM,Spring KR

更新日期：1998-05-26 00:00:00