Contrasts between oxygenic and anoxygenic photoreduction of ferredoxin: Incompatibilities with prevailing concepts of photosynthetic electron transport.

abstract：:LMB-7 [B3(Fv)-PE38] is a single-chain immunotoxin constructed from the murine monoclonal antibody B3 and a truncated from of Pseudomonas exotoxin PE38. Antibody B3 recognizes a carbohydrate epitope found on solid tumors that frequently invade the intrathecal space and cause neoplastic meningitis. We tested the therape...

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

authors： Pastan IH,Archer GE,McLendon RE,Friedman HS,Fuchs HE,Wang QC,Pai LH,Herndon J,Bigner DD

更新日期：1995-03-28 00:00:00

abstract：:In vitro DNA synthesis was studied in HeLa cell nuclei, with emphasis on the question of whether newly replicated DNA is associated with nucleosomes. The newly replicated DNA was twice as sensitive to digestion by micrococcal nuclease as mature chromatin DNA, reaching a limit digest at 20-25% acid-insoluble product. E...

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

authors： Seale RL

更新日期：1978-06-01 00:00:00

abstract：:According to the Dobzhansky-Muller model, hybrid sterility is a consequence of the independent evolution of related taxa resulting in incompatible genomic interactions of their hybrids. The model implies that the incompatibilities evolve randomly, unless a particular gene or nongenic sequence diverges much faster than...

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

authors： Bhattacharyya T,Gregorova S,Mihola O,Anger M,Sebestova J,Denny P,Simecek P,Forejt J

更新日期：2013-02-05 00:00:00

abstract：:Transcription factor TFIID consists of TATA binding protein (TBP) and at least eight TBP-associated factors (TAFs). As TAFs are required for activated but not basal transcription, we have proposed that TAFs act as coactivators to mediate signals between activators and the basal transcription machinery. Here we report ...

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

authors： Klemm RD,Goodrich JA,Zhou S,Tjian R

更新日期：1995-06-20 00:00:00

abstract：:Ants are the world's most conspicuous and important eusocial insects and their diversity, abundance, and extreme behavioral specializations make them a model system for several disciplines within the biological sciences. Here, we report the discovery of a new ant that appears to represent the sister lineage to all ext...

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

authors： Rabeling C,Brown JM,Verhaagh M

更新日期：2008-09-30 00:00:00

abstract：:Bones from a stratified sedimentary deposit in the Puu Naio Cave site on Maui, Hawaiian Islands, reveal the late Holocene extinction of 19 species of birds. The age of the sediment and associated fauna was determined by direct radiocarbon dating (tandem particle accelerator-mass spectrometer; TAMS) of amino acids extr...

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

authors： James HF,Stafford TW Jr,Steadman DW,Olson SL,Martin PS,Jull AJ,McCoy PC

更新日期：1987-04-01 00:00:00

abstract：:Autophagy is responsible for nonspecific, bulk degradation of cytoplasmic components. Recent work has revealed also that there is specific, autophagic degradation of polyubiquitinated protein aggregates, whose buildup occurs during neurodegenerative disease. Here, we report that simple mono-ubiquitination of normally ...

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

authors： Kim PK,Hailey DW,Mullen RT,Lippincott-Schwartz J

更新日期：2008-12-30 00:00:00

abstract：:The specificity with which the genetic code is read in protein synthesis, and with which other highly specific biosynthetic reactions take place, can be increased above the level available from free energy differences in intermediates or kinetic barriers by a process defined here as kinetic proofreading. A simple kine...

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

authors： Hopfield JJ

更新日期：1974-10-01 00:00:00

abstract：:Phosphorylation of inositol phospholipids plays a key role in cellular regulation via the generation of intracellular second messengers. In addition, it represents a mechanism to regulate interactions of the lipid bilayer with proteins and protein scaffolds involved in vesicle budding, cytoskeletal organization, and s...

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

authors： Guo J,Wenk MR,Pellegrini L,Onofri F,Benfenati F,De Camilli P

更新日期：2003-04-01 00:00:00

abstract：:The oxygenation of the atmosphere ∼2.45-2.32 billion years ago (Ga) is one of the most significant geological events to have affected Earth's redox history. Our understanding of the timing and processes surrounding this key transition is largely dependent on the development of redox-sensitive proxies, many of which re...

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

authors： Chi Fru E,Rodríguez NP,Partin CA,Lalonde SV,Andersson P,Weiss DJ,El Albani A,Rodushkin I,Konhauser KO

更新日期：2016-05-03 00:00:00

abstract：:The dorsolateral striatum (DLS) is essential for motor and procedure learning, but the role of DLS spiny projection neurons (SPNs) of direct and indirect pathways, as marked, respectively, by D1 and D2 receptor (D1R and D2R) expression, remains to be clarified. Long-term two-photon calcium imaging of the same neuronal...

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

authors： Sheng MJ,Lu D,Shen ZM,Poo MM

更新日期：2019-05-28 00:00:00

abstract：:Columnar stromatolites were abundant and widespread in the Proterozoic but are exceedingly rare in modern seas. Consequently, the stromatolites at Hamelin Pool in Shark Bay, Western Australia, have been widely interpreted as unique modern analogs of ancient stromatolites constructed by complex communities of cyanobact...

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

authors： Awramik SM,Riding R

更新日期：1988-03-01 00:00:00

abstract：:A cDNA library prepared from human liver has been screened for factor IX (Christmas factor), a clotting factor that participates in the middle phase of blood coagulation. The library was screened with a single-stranded DNA prepared from enriched mRNA for baboon factor IX and a synthetic oligonucleotide mixture. A plas...

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

authors： Kurachi K,Davie EW

更新日期：1982-11-01 00:00:00

abstract：:Parkinson's disease (PD) is a neurodegenerative disorder of uncertain pathogenesis characterized by a loss of substantia nigra pars compacta (SNpc) dopaminergic (DA) neurons, and can be modeled by the neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Both inflammatory processes and oxidative stress may c...

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

authors： Wu DC,Teismann P,Tieu K,Vila M,Jackson-Lewis V,Ischiropoulos H,Przedborski S

更新日期：2003-05-13 00:00:00

abstract：:The highly ordered and reproducible structure of the fungal prion HET-s makes it an excellent model system for studying the inherent properties of prions, self-propagating infectious proteins that have been implicated in a number of fatal diseases. In particular, the HET-s prion-forming domain readily folds into a rel...

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

authors： Wan W,Stubbs G

更新日期：2014-04-08 00:00:00

abstract：:Groundwater-dependent species are among the least-known components of global biodiversity, as well as some of the most vulnerable because of rapid groundwater depletion at regional and global scales. The karstic Edwards-Trinity aquifer system of west-central Texas is one of the most species-rich groundwater systems in...

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

authors： Devitt TJ,Wright AM,Cannatella DC,Hillis DM

更新日期：2019-02-12 00:00:00

abstract：:The molecular mechanism of growth hormone release by synthetic somatocrinin was investigated on purified hog anterior pituitary secretory granules; the granules were found to contain a cAMP-dependent protein kinase that catalyzed [gamma-32P]-ATP histone phosphorylation with maximal rates ranging from 1 to 5 nmol of Pi...

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

authors： Lewin MJ,Reyl-Desmars F,Ling N

更新日期：1983-11-01 00:00:00

abstract：:A high-pressure investigation of the Xe*H(2)O chemical system was conducted by using diamond-anvil cell techniques combined with in situ Raman spectroscopy, synchrotron x-ray diffraction, and laser heating. Structure I xenon clathrate was observed to be stable up to 1.8 GPa, at which pressure it transforms to a new Xe...

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

authors： Sanloup C,Mao Hk HK,Hemley RJ

更新日期：2002-01-08 00:00:00

abstract：:Germ-line missense mutations of the receptor-like tyrosine kinase ret are the causative genetic event of the multiple endocrine neoplasia (MEN) type 2A and type 2B syndromes and of the familial medullary thyroid carcinoma. We have used the rat pheochromocytoma cell line, PC12, as a model system to investigate the mech...

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

authors： Califano D,D'Alessio A,Colucci-D'Amato GL,De Vita G,Monaco C,Santelli G,Di Fiore PP,Vecchio G,Fusco A,Santoro M,de Franciscis V

更新日期：1996-07-23 00:00:00

abstract：:The fate of two recently described human B lymphocyte-specific antigens (B1 and B2) was studied after B-cell activation in vivo and in vitro. Whereas both B1 and B2 were present on virtually all B cells from normal lymph nodes, B2 was absent from approximately 50% of B cells from hyperplastic lymph nodes. When B cells...

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

authors： Stashenko P,Nadler LM,Hardy R,Schlossman SF

更新日期：1981-06-01 00:00:00

abstract：:Epstein-Barr virus (EBV) and Kaposi's sarcoma herpesvirus (KSHV) cause ∼2% of all human cancers. RNase R-resistant RNA sequencing revealed that both gammaherpesviruses encode multiple, uniquely stable, circular RNAs (circRNA). EBV abundantly expressed both exon-only and exon-intron circRNAs from the BamHI A rightward ...

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

authors： Toptan T,Abere B,Nalesnik MA,Swerdlow SH,Ranganathan S,Lee N,Shair KH,Moore PS,Chang Y

更新日期：2018-09-11 00:00:00

abstract：:Heparinase I from Flavobacterium heparinum has important uses for elucidating the complex sequence heterogeneity of heparin-like glycosaminoglycans (HLGAGs). Understanding the biological function of HLGAGs has been impaired by the limited methods for analysis of pure or mixed oligosaccharide fragments. Here, we use me...

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

authors： Ernst S,Rhomberg AJ,Biemann K,Sasisekharan R

更新日期：1998-04-14 00:00:00

abstract：:We performed a genome-wide analysis of gene expression in primary human CD15(+) myeloid progenitor cells. By using the serial analysis of gene expression (SAGE) technique, we obtained quantitative information for the expression of 37,519 unique SAGE-tag sequences. Of these unique tags, (i) 25% were detected at high an...

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

authors： Lee S,Zhou G,Clark T,Chen J,Rowley JD,Wang SM

更新日期：2001-03-13 00:00:00

abstract：:Tyrosine hydroxylase (EC 1.14.16.2), the enzyme catalyzing the rate-limiting step in catecholamine biosynthesis, was localized by electron microscopy within noradrenergic neurons of the nucleus locus coeruleus of the rat brain with a specific antibody to tyrosine hydroxylase labeled by the peroxidase-antiperoxidase im...

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

authors： Pickel VM,Joh TH,Reis DJ

更新日期：1975-02-01 00:00:00

abstract：:Spectral methods are of fundamental importance in statistics and machine learning, because they underlie algorithms from classical principal components analysis to more recent approaches that exploit manifold structure. In most cases, the core technical problem can be reduced to computing a low-rank approximation to a...

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

authors： Belabbas MA,Wolfe PJ

更新日期：2009-01-13 00:00:00

abstract：:Skin wound infections are a significant health problem, and antibiotic resistance is on the rise. Mast cells (MCs) have been shown to contribute to host-defense responses in certain bacterial infections, but their role in skin wound superinfection is unknown. We subjected 2 MC-deficient mouse strains to Pseudomonas ae...

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

authors： Zimmermann C,Troeltzsch D,Giménez-Rivera VA,Galli SJ,Metz M,Maurer M,Siebenhaar F

更新日期：2019-10-08 00:00:00

abstract：:A specific high-affinity receptor for leukotriene C4 (LTC4) has been identified on segments of longitudinal smooth muscle from guinea pig ileum, in disrupted cells obtained from the ileal segments, and in subcellular fractions enriched for mitochondrial membranes and plasma membranes, respectively. Specific [3H]LTC4 b...

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

authors： Krilis S,Lewis RA,Corey EJ,Austen KF

更新日期：1984-07-01 00:00:00

abstract：:Mouse blastocyst functions have been shown to be disrupted by in vitro exposure to N-methyl-N-nitrosourea (MeNU). After exposure, the chemically treated blastocysts were transferred to the uteri of pseudopregnant surrogate mothers. Implantation rate and birth rate have been shown previously to decrease in a concentrat...

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

authors： Bossert NL,Iannaccone PM

更新日期：1985-12-01 00:00:00

abstract：:Echoviruses are enteroviruses that belong to Picornaviridae. Many echoviruses use decay-accelerating factor (DAF) as their cellular receptor. DAF is a glycosylphosphatidyl inositol-anchored complement regulatory protein found on most cell surfaces. It functions to protect cells from complement attack. The cryo-electro...

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

authors： He Y,Lin F,Chipman PR,Bator CM,Baker TS,Shoham M,Kuhn RJ,Medof ME,Rossmann MG

更新日期：2002-08-06 00:00:00

abstract：:The probability of choosing an alternative in a long sequence of repeated choices is proportional to the total reward derived from that alternative, a phenomenon known as Herrnstein's matching law. This behavior is remarkably conserved across species and experimental conditions, but its underlying neural mechanisms st...

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

authors： Loewenstein Y,Seung HS

更新日期：2006-10-10 00:00:00