Exceptional chemical and thermal stability of zeolitic imidazolate frameworks.

abstract：:Cell-cycle progression is mediated by a co-ordinated interaction between cyclin-dependent kinases and their target proteins including the pRB and E2F/DP-1 complexes. Immunoneutralization and antisense experiments have established that the abundance of cyclin D1, a regulatory subunit of the cyclin-dependent kinases, ma...

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

authors： Watanabe G,Howe A,Lee RJ,Albanese C,Shu IW,Karnezis AN,Zon L,Kyriakis J,Rundell K,Pestell RG

更新日期：1996-11-12 00:00:00

abstract：:Heat-shock factor 1 (HSF1) is the master transcriptional regulator of the cellular response to heat and a wide variety of other stressors. We previously reported that HSF1 promotes the survival and proliferation of malignant cells. At this time, however, the clinical and prognostic significance of HSF1 in cancer is un...

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

authors： Santagata S,Hu R,Lin NU,Mendillo ML,Collins LC,Hankinson SE,Schnitt SJ,Whitesell L,Tamimi RM,Lindquist S,Ince TA

更新日期：2011-11-08 00:00:00

abstract：:The POT1-TPP1 heterodimer, the major telomere-specific single-stranded DNA-binding protein in mammalian cells, protects chromosome ends and contributes to the regulation of telomerase. The recent discovery of telomeric RNA raises the question of how POT1 faithfully binds telomeric ssDNA and avoids illicit RNA binding ...

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

authors： Nandakumar J,Podell ER,Cech TR

更新日期：2010-01-12 00:00:00

abstract：:The BCL2 protooncogene encodes an inner mitochondrial membrane protein that blocks programmed cell death. BCL2 was isolated from the chromosomal breakpoint of follicular B-cell lymphoma. Transgenic mice that overexpress BCL2 display extended survival of resting B cells. In this study we use a monospecific anti-human B...

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

authors： Hockenbery DM,Zutter M,Hickey W,Nahm M,Korsmeyer SJ

更新日期：1991-08-15 00:00:00

abstract：:The tetrodotoxin binding component of the voltage-sensitive sodium channel from Electrophorus electricus electroplax was purified by using a monoclonal antibody. An impure preparation of tetrodotoxin binding component was mixed with the pure monoclonal antibody, and the immune complex so formed was isolated by affinit...

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

authors： Nakayama H,Withy RM,Raftery MA

更新日期：1982-12-01 00:00:00

abstract：:We introduce a quantitative framework for assessing the generation of crossovers in DNA shuffling experiments. The approach uses free energy calculations and complete sequence information to model the annealing process. Statistics obtained for the annealing events then are combined with a reassembly algorithm to infer...

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

authors： Moore GL,Maranas CD,Lutz S,Benkovic SJ

更新日期：2001-03-13 00:00:00

abstract：:A computational model is presented that can be used as a tool in the design of safer chemicals. This model predicts the rate of hydrogen-atom abstraction by cytochrome P450 enzymes. Excellent correlations between biotransformation rates and the calculated activation energies (delta Hact) of the cytochrome P450-mediate...

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

authors： Yin H,Anders MW,Korzekwa KR,Higgins L,Thummel KE,Kharasch ED,Jones JP

更新日期：1995-11-21 00:00:00

abstract：:With the goal of developing techniques for DNA insertional mutagenesis in zebrafish, we established procedures for rapidly obtaining and injecting large numbers of fertilized eggs. Using either of two plasmid constructs, we injected uncut DNA into fertilized eggs at the one- or two-cell stage. Fish hatched from inject...

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

authors： Culp P,Nüsslein-Volhard C,Hopkins N

更新日期：1991-09-15 00:00:00

abstract：:The papain-solubilized fragment of the heavy chain of HLA-B7, which is the NH2-terminal part of the whole polypeptide chain, can be divided into three regions by mild acid and cyanogen bromide cleavages. The first 100 amino acids terminating in a methionine residue contain the carbohydrate moiety; this segment is foll...

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

authors： Terhorst C,Robb R,Jones C,Strominger JL

更新日期：1977-09-01 00:00:00

abstract：:Glucose, one of the most important nutrients for animals, acts as a regulatory signal that controls the secretion of hormones, such as insulin, by endocrine tissues. However, how organisms respond to extracellular glucose and how glucose controls nutrient homeostasis remain unknown. Here, we show that a putative Droso...

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

authors： Kohyama-Koganeya A,Kim YJ,Miura M,Hirabayashi Y

更新日期：2008-10-07 00:00:00

abstract：:We obtain a collection of multilinear Littlewood-Paley estimates, which we then apply to two problems in partial differential equations. The first problem is the estimation of the square root of an elliptic operator in divergence form, and the second is the estimation of solutions to the Cauchy problem for nondivergen...

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

authors： Fabes EB,Jerison DS,Kenig CE

更新日期：1982-09-01 00:00:00

abstract：:The measurement of any nonchromosomal genetic contribution to the heritability of a trait is often confounded by the inability to control both the chromosomal and nonchromosomal information in a population. We have designed a unique system in yeast where we can control both sources of information so that the phenotype...

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

authors： Edwards MD,Symbor-Nagrabska A,Dollard L,Gifford DK,Fink GR

更新日期：2014-05-27 00:00:00

abstract：:Ecological responses to on-going climate change are numerous, diverse, and taxonomically widespread. However, with one exception, the relative roles of phenotypic plasticity and microevolution as mechanisms in explaining these responses are largely unknown. Several recent studies have uncovered evidence for temporal d...

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

authors： Teplitsky C,Mills JA,Alho JS,Yarrall JW,Merilä J

更新日期：2008-09-09 00:00:00

abstract：:The involvement of methylation in the chemosensory response of bacteria to many attractants has been clearly established by studies in several laboratories. It has been assumed that adaptation of Salmonella typhimurium and Escherichia coli to all attractants involves methylation of a transmembrane methyl-accepting che...

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

authors： Niwano M,Taylor BL

更新日期：1982-01-01 00:00:00

abstract：:Awareness that our planet is a self-supporting biosphere with sunlight as its major source of energy for life has resulted in a long-term historical fascination with the workings of self-supporting ecological systems. However, the studies of such systems have never entered the canon of ecological or evolutionary tools...

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

authors： Rillig MC,Antonovics J

更新日期：2019-06-04 00:00:00

abstract：:Linear porphyrin arrays self-assembled by either hydrogen bonding or metal ion coordination self-organize into lipid bilayer membranes. The length of the transmembrane assemblies is determined both by the thermodynamics of the intermolecular interactions in the supermolecule and by the dimension and physical chemical ...

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

authors： Drain CM

更新日期：2002-04-16 00:00:00

abstract：:Highly pathogenic avian influenza A viruses of subtypes H5 and H7 are the causative agents of fowl plague in poultry. Influenza A viruses of subtype H5N1 also caused severe respiratory disease in humans in Hong Kong in 1997 and 2003, including at least seven fatal cases, posing a serious human pandemic threat. Between...

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

authors： Fouchier RA,Schneeberger PM,Rozendaal FW,Broekman JM,Kemink SA,Munster V,Kuiken T,Rimmelzwaan GF,Schutten M,Van Doornum GJ,Koch G,Bosman A,Koopmans M,Osterhaus AD

更新日期：2004-02-03 00:00:00

abstract：:Managing excess nutrients remains a major obstacle to improving ecosystem service benefits of urban waters. To inform more ecologically based landscape nutrient management, we compared watershed inputs, outputs, and retention for nitrogen (N) and phosphorus (P) in seven subwatersheds of the Mississippi River in St. Pa...

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

authors： Hobbie SE,Finlay JC,Janke BD,Nidzgorski DA,Millet DB,Baker LA

更新日期：2017-04-18 00:00:00

abstract：:We have investigated the frequency of p53 mutations in B- and T-cell human lymphoid malignancies, including acute lymphoblastic leukemia, the major subtypes of non-Hodgkin lymphoma, and chronic lymphocytic leukemia. p53 exons 5-9 were studied by using genomic DNA from 197 primary tumors and 27 cell lines by single-str...

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

authors： Gaidano G,Ballerini P,Gong JZ,Inghirami G,Neri A,Newcomb EW,Magrath IT,Knowles DM,Dalla-Favera R

更新日期：1991-06-15 00:00:00

abstract：:Ocean acidification (OA) refers to the ongoing decline in oceanic pH resulting from the uptake of atmospheric CO(2). Mounting experimental evidence suggests that OA will have negative consequences for a variety of marine organisms. Whereas the effect of OA on the calcification of adult reef corals is increasingly well...

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

authors： Albright R,Mason B,Miller M,Langdon C

更新日期：2010-11-23 00:00:00

abstract：:Activation of the androgen receptor (AR) may play a role in androgen-independent progression of prostate cancer. Multiple mechanisms of AR activation, including stimulation by tyrosine kinases, have been postulated. We and others have recently shown involvement of activated Cdc42-associated tyrosine kinase Ack1 in adv...

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

authors： Mahajan NP,Liu Y,Majumder S,Warren MR,Parker CE,Mohler JL,Earp HS,Whang YE

更新日期：2007-05-15 00:00:00

abstract：:Tubulin cofactor B (TCoB) plays an important role in microtubule dynamics by facilitating the dimerization of alpha- and beta-tubulin. Recent evidence suggests that p21-activated kinase 1 (Pak1), a major signaling nodule in eukaryotic cells, phosphorylates TCoB on Ser-65 and Ser-128 and plays an essential role in micr...

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

authors： Rayala SK,Martin E,Sharina IG,Molli PR,Wang X,Jacobson R,Murad F,Kumar R

更新日期：2007-12-04 00:00:00

abstract：:The 72-kDa spleen tyrosine kinase (Syk) and Src-family kinase p53/56Lyn (Lyn) contribute to signaling via the B-cell antigen receptor complex. Here we show that Syk and Lyn from human B lymphocytes can interact directly. Syk and Lyn coimmunoprecipitated from mature and activated B-cell lines, and gel-purified Syk and ...

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

authors： Sidorenko SP,Law CL,Chandran KA,Clark EA

更新日期：1995-01-17 00:00:00

abstract：:Plasmodium vivax uses a single member of the Duffy binding-like (DBL) receptor family to invade erythrocytes and is not found in West Africa where its erythrocyte ligand, the Duffy blood group antigen, is missing. In contrast, Plasmodium falciparum expresses four members of the DBL family, and remarkably, single-point...

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

authors： Mayer DC,Jiang L,Achur RN,Kakizaki I,Gowda DC,Miller LH

更新日期：2006-02-14 00:00:00

abstract：:Alzheimer beta/A4 amyloid precursor protein (APP) has been suggested to play a central role in the pathogenesis of Alzheimer disease. We have measured the content of different species of APP holoprotein and carboxyl-terminal fragments in human brains from young individuals, nondemented aged individuals, and aged indiv...

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

authors： Nordstedt C,Gandy SE,Alafuzoff I,Caporaso GL,Iverfeldt K,Grebb JA,Winblad B,Greengard P

更新日期：1991-10-15 00:00:00

abstract：:A study of the near-infrared absorption spectra of three oxygen compounds of membrane-bound cytochrome oxidase (ferrocytochrome c:oxygen oxidoreductase; EC 1.9.3.1) shows that the formation of compound A (oxycytochrome oxidase) causes no significant infrared absorbance changes at -103 degrees. At -64 degrees, the form...

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

authors： Chance B,Leigh JS Jr

更新日期：1977-11-01 00:00:00

abstract：:We have developed a homologous in vitro transcription system that requires (i) 2,3,7,8-tetrachlorodibenzo-p-dioxin (called TCDD or dioxin), (ii) the Ah receptor, and (iii) a dioxin-responsive enhancer for activity. Unfractionated nuclear extracts from mouse hepatoma cells contain an inhibitor and fail to direct transc...

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

authors： Wen LP,Koeiman N,Whitlock JP Jr

更新日期：1990-11-01 00:00:00

abstract：:Combined intracellular and microfluorometric recording techniques were used to evaluate whether the inhibition by cholinergic or adrenergic transmitters of the Ca2(+)-activated potassium current (IAHP) in hippocampal CA3 pyramidal cells was mediated by an alteration of depolarization-induced change in cytosolic free C...

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

authors： Knöpfel T,Vranesic I,Gähwiler BH,Brown DA

更新日期：1990-06-01 00:00:00

abstract：:Cyclooxygenase (COX)-2, a rate-limiting enzyme of prostaglandin (PG) production, is overexpressed in colorectal adenomas and adenocarcinomas, and its inhibition by nonsteroidal antiinflammatory drugs protects against colorectal cancer. Mechanisms of cancer promotion by COX-2 are not fully understood, but signaling thr...

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

authors： Nishihara H,Kizaka-Kondoh S,Insel PA,Eckmann L

更新日期：2003-07-22 00:00:00

abstract：:The mechanism of the inotropic effect of cardiac glycosides on the heart has long been controversial. Inotropic effects at low concentrations of cardiac glycosides indicate more than one class of receptor or more than one cellular mechanism. In the brain of the rat, high- and low-affinity cardiac glycoside receptors h...

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

authors： Sweadner KJ,Farshi SK

更新日期：1987-12-01 00:00:00