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  • 1
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    Regulation of mitochondrial iron accumulation by Yfh1p, a putative homolog of frataxin (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1997-06-13
    Beschreibung: The gene responsible for Friedreich's ataxia, a disease characterized by neurodegeneration and cardiomyopathy, has recently been cloned and its product designated frataxin. A gene in Saccharomyces cerevisiae was characterized whose predicted protein product has high sequence similarity to the human frataxin protein. The yeast gene (yeast frataxin homolog, YFH1) encodes a mitochondrial protein involved in iron homeostasis and respiratory function. Human frataxin also was shown to be a mitochondrial protein. Characterizing the mechanism by which YFH1 regulates iron homeostasis in yeast may help to define the pathologic process leading to cell damage in Friedreich's ataxia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Babcock, M -- de Silva, D -- Oaks, R -- Davis-Kaplan, S -- Jiralerspong, S -- Montermini, L -- Pandolfo, M -- Kaplan, J -- DK30534/DK/NIDDK NIH HHS/ -- DK49219/DK/NIDDK NIH HHS/ -- NS34192/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1709-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, School of Medicine, University of Utah, Salt Lake City, UT 84132, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180083" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Biological Transport ; Carrier Proteins/metabolism ; Cell Membrane/metabolism ; *Ceruloplasmin ; Cytosol/metabolism ; Friedreich Ataxia/metabolism ; Fungal Proteins/genetics/*metabolism ; Genes, Fungal ; Genetic Complementation Test ; Homeostasis ; Humans ; Iron/*metabolism ; *Iron-Binding Proteins ; Membrane Transport Proteins/metabolism ; Mitochondria/*metabolism ; Oxidative Stress ; Oxidoreductases/metabolism ; Phosphotransferases (Alcohol Group Acceptor)/metabolism ; Recombinant Fusion Proteins/metabolism ; Saccharomyces cerevisiae/genetics/growth & development/*metabolism ; *Saccharomyces cerevisiae Proteins ; Transformation, Genetic
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 2
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    Coherent single-photon emission from colloidal lead halide perovskite quantum dots (2019)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publikationsdatum: 2019
    Beschreibung: 〈p〉Chemically made colloidal semiconductor quantum dots have long been proposed as scalable and color-tunable single emitters in quantum optics, but they have typically suffered from prohibitively incoherent emission. We now demonstrate that individual colloidal lead halide perovskite quantum dots (PQDs) display highly efficient single-photon emission with optical coherence times as long as 80 picoseconds, an appreciable fraction of their 210-picosecond radiative lifetimes. These measurements suggest that PQDs should be explored as building blocks in sources of indistinguishable single photons and entangled photon pairs. Our results present a starting point for the rational design of lead halide perovskite–based quantum emitters that have fast emission, wide spectral tunability, and scalable production and that benefit from the hybrid integration with nanophotonic components that has been demonstrated for colloidal materials.〈/p〉
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 3
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    Eight centuries of north atlantic ocean atmosphere variability (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1999-11-27
    Beschreibung: Climate in the tropical North Atlantic is controlled largely by variations in the strength of the trade winds, the position of the Intertropical Convergence Zone, and sea surface temperatures. A high-resolution study of Caribbean sediments provides a subdecadally resolved record of tropical upwelling and trade wind variability spanning the past 825 years. These results confirm the importance of a decadal (12- to 13-year) mode of Atlantic variability believed to be driven by coupled tropical ocean-atmosphere dynamics. Although a well-defined interdecadal mode of variability does not appear to be characteristic of the tropical Atlantic, there is evidence that century-scale variability is substantial. The tropical Atlantic may also have been involved in a major shift in Northern Hemisphere climate variability that took place about 700 years ago.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Black -- Peterson -- Overpeck -- Kaplan -- Evans -- Kashgarian -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1709-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, USA. National Oceanic and Atmospheric Administration Paleoclimatology Program and the Institute for Arctic and Alpine Research, University of Colorado, B.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10576732" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 4
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    An anti-apoptotic role for the p53 family member, p73, during developmental neuron death (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2000-07-15
    Beschreibung: p53 plays an essential pro-apoptotic role, a function thought to be shared with its family members p73 and p63. Here, we show that p73 is primarily present in developing neurons as a truncated isoform whose levels are dramatically decreased when sympathetic neurons apoptose after nerve growth factor (NGF) withdrawal. Increased expression of truncated p73 rescues these neurons from apoptosis induced by NGF withdrawal or p53 overexpression. In p73-/- mice, all isoforms of p73 are deleted and the apoptosis of developing sympathetic neurons is greatly enhanced. Thus, truncated p73 is an essential anti-apoptotic protein in neurons, serving to counteract the pro-apoptotic function of p53.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pozniak, C D -- Radinovic, S -- Yang, A -- McKeon, F -- Kaplan, D R -- Miller, F D -- New York, N.Y. -- Science. 2000 Jul 14;289(5477):304-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neuronal Survival, Brain Tumor Research Center, Montreal Neurological Institute, McGill University, Montreal, Canada H3A 2B4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10894779" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenoviridae/genetics ; Animals ; Apoptosis/*physiology ; Cells, Cultured ; DNA-Binding Proteins/biosynthesis/chemistry/*physiology ; Escherichia coli ; Genes, Tumor Suppressor ; Humans ; Mice ; Mice, Inbred BALB C ; Nerve Growth Factor/pharmacology ; Neurons/*physiology ; Nuclear Proteins/biosynthesis/chemistry/*physiology ; Protein Isoforms/biosynthesis/chemistry/physiology ; Recombinant Proteins ; Sympathetic Nervous System/cytology/*physiology ; Tumor Suppressor Protein p53/antagonists & inhibitors/*physiology ; Tumor Suppressor Proteins
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    Neurobiology. TRK makes the retrograde (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2002-02-23
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Freda D -- Kaplan, David R -- New York, N.Y. -- Science. 2002 Feb 22;295(5559):1471-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Neuronal Survival and Brain Tumor Research Centre, Montreal Neurological Institute, McGill University, 3801 rue University, Montreal, Quebec H3A 2B4, Canada. freda.miller@mcgill.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11859179" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Axons/*metabolism ; Cell Survival ; Enzyme Activation ; Mitogen-Activated Protein Kinase 1/metabolism ; Mitogen-Activated Protein Kinase 3 ; Mitogen-Activated Protein Kinases/metabolism ; Models, Neurological ; Nerve Growth Factor/*metabolism ; Neurons/metabolism/*physiology ; Phosphatidylinositol 3-Kinases/metabolism ; Protein Transport ; Rats ; Receptor, trkA/*metabolism ; *Signal Transduction ; Transport Vesicles/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 6
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    Management accounting for advanced technological environments (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1989-08-25
    Beschreibung: Management accounting systems designed decades ago no longer provide timely, relevant information for companies in today's highly competitive environment. New operational control and performance measurement systems are recognizing the importance of direct measurement of quality, manufacturing lead times, flexibility, and customer responsiveness, as well as more accurate measures of the actual costs of consumed resources. Activity-based cost systems can assign the costs of indirect and support resources to the specific products and activities that benefit from these resources. Both operational control and activity-based systems represent new opportunities for improved managerial information in complex, technologically advanced environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaplan, R S -- New York, N.Y. -- Science. 1989 Aug 25;245(4920):819-23.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17773356" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 7
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    Direct regulation of the Akt proto-oncogene product by phosphatidylinositol-3,4-bisphosphate (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1997-01-31
    Beschreibung: The regulation of the serine-threonine kinase Akt by lipid products of phosphoinositide 3-kinase (PI 3-kinase) was investigated. Akt activity was found to correlate with the amount of phosphatidylinositol-3,4-bisphosphate (PtdIns-3,4-P2) in vivo, and synthetic PtdIns-3,4-P2 activated Akt both in vitro and in vivo. Binding of PtdIns-3,4-P2 occurred within the Akt pleckstrin homology (PH) domain and facilitated dimerization of Akt. Akt mutated in the PH domain was not activated by PI 3-kinase in vivo or by PtdIns-3, 4-P2 in vitro, and it was impaired in binding to PtdIns-3,4-P2. Examination of the binding to other phosphoinositides revealed that they bound to the Akt PH domain with much lower affinity than did PtdIns-3,4-P2 and failed to increase Akt activity. Thus, Akt is apparently regulated by the direct interaction of PtdIns-3,4-P2 with the Akt PH domain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Franke, T F -- Kaplan, D R -- Cantley, L C -- Toker, A -- GM41890/GM/NIGMS NIH HHS/ -- N01-CO-74101/CO/NCI NIH HHS/ -- R01 GM041890/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jan 31;275(5300):665-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉ABL-Basic Research Program, National Cancer Institute-Frederick Cancer Research Facility and Development Center (NCI-FCRFDC), Frederick, MD 21702, USA. tfranke@bidmc.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005852" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 3T3 Cells ; Animals ; COS Cells ; Dimerization ; Enzyme Activation ; Mice ; Phosphatidylinositol 3-Kinases ; Phosphatidylinositol Phosphates/*metabolism/pharmacology ; Phosphorylation ; Phosphotransferases (Alcohol Group Acceptor)/metabolism ; Platelet-Derived Growth Factor/pharmacology ; Point Mutation ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-akt ; Recombinant Fusion Proteins/chemistry/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 8
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    Poliovirus mutants resistant to neutralization with soluble cell receptors (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1990-12-14
    Beschreibung: Poliovirus mutants resistant to neutralization with soluble cellular receptor were isolated. Replication of soluble receptor-resistant (srr) mutants was blocked by a monoclonal antibody directed against the HeLa cell receptor for poliovirus, indicating that the mutants use this receptor to enter cells. The srr mutants showed reduced binding to HeLa cells and cell membranes. However, the reduced binding phenotype did not have a major impact on viral replication, as judged by plaque size and one-step growth curves. These results suggest that the use of soluble receptors as antiviral agents could lead to the selection of neutralization-resistant mutants that are able to bind cell surface receptors, replicate, and cause disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaplan, G -- Peters, D -- Racaniello, V R -- AI20017/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1990 Dec 14;250(4987):1596-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, College of Physicians and Surgeons of Columbia University, New York, NY 10032.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2177226" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies, Monoclonal/immunology ; Antiviral Agents ; Baculoviridae/genetics ; Cell Line ; Cell Membrane/metabolism ; Centrifugation, Density Gradient ; DNA/genetics ; Genetic Vectors ; HeLa Cells ; Humans ; Insects ; Mutation ; Neutralization Tests ; Poliovirus/genetics/*physiology ; Receptors, Virus/genetics/*physiology ; Recombinant Proteins/physiology ; Transfection ; Virus Replication
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
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    The trk proto-oncogene product: a signal transducing receptor for nerve growth factor (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1991-04-26
    Beschreibung: The trk proto-oncogene encodes a 140-kilodalton, membrane-spanning protein tyrosine kinase (p140prototrk) that is expressed only in neural tissues. Nerve growth factor (NGF) stimulates phosphorylation of p140prototrk in neural cell lines and in embryonic dorsal root ganglia. Affinity cross-linking and equilibrium binding experiments with 125I-labeled NGF indicate that p140prototrk binds NGF specifically in cultured cells with a dissociation constant of 10(-9) molar. The identification of p140prototrk as an NGF receptor indicates that this protein participates in the primary signal transduction mechanism of NGF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaplan, D R -- Hempstead, B L -- Martin-Zanca, D -- Chao, M V -- Parada, L F -- N01-CO-74101/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 Apr 26;252(5005):554-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Eukaryotic Signal Transduction Group, National Cancer Institute-Frederick Cancer Research and Development Center, MD 21702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1850549" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Line ; Cell Membrane/physiology ; Cross-Linking Reagents ; Embryo, Mammalian ; Ganglia, Spinal/*metabolism ; Humans ; Kinetics ; Mice ; Nerve Growth Factors/metabolism/*physiology ; Neuroblastoma ; Protein-Tyrosine Kinases/*metabolism ; Proto-Oncogene Proteins/*metabolism ; *Proto-Oncogenes ; Receptor, trkA ; Receptors, Cell Surface/metabolism/*physiology ; Receptors, Nerve Growth Factor ; *Signal Transduction
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
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    Deleted HTLV-I provirus in blood and cutaneous lesions of patients with mycosis fungoides (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1991-07-19
    Beschreibung: Mycosis fungoides, a rare form of cutaneous T cell leukemia/lymphoma, is suspected of having a viral etiology on the basis of certain similarities to adult T cell leukemia, which is associated with human T cell leukemia/lymphoma virus type I (HTLV-I) infection. Cell lines were established from peripheral blood mononuclear cells (PBMC) of an HTLV-I-seronegative patient with mycosis fungoides. DNA hybridization analysis revealed the presence of HTLV-I-related sequences with unusual restriction endonuclease sites. Sequence analysis of subcloned fragments demonstrated the presence of a monoclonally integrated provirus with a 5.5-kilobase deletion involving large regions of gag and env and all of pol. Additional evidence for the presence of deleted proviruses was found by polymerase chain reaction (PCR) amplification of DNA from cutaneous lesions of five other HTLV-I-seronegative patients. The findings suggest that HTLV-I infection may be involved in the etiology of at least certain cases of mycosis fungoides.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, W W -- Liu, C R -- Schneewind, O -- Takahashi, H -- Kaplan, M H -- Roupe, G -- Vahlne, A -- CA51012-01A1/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 19;253(5017):317-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Infectious Disease, North Shore University Hospital-Cornell University Medical College, Manhasset, NY 11030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1857968" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Sequence ; *Chromosome Deletion ; DNA, Neoplasm/genetics/isolation & purification ; DNA, Viral/genetics/isolation & purification ; *Genes, Viral ; Human T-lymphotropic virus 1/genetics/*isolation & purification ; Humans ; Lymphocytes/*microbiology ; Molecular Sequence Data ; Mycosis Fungoides/blood/*microbiology ; Oligonucleotide Probes ; Polymerase Chain Reaction ; Proviruses/genetics/*isolation & purification ; Restriction Mapping ; Sequence Homology, Nucleic Acid ; Skin/*microbiology ; Skin Neoplasms/blood/*microbiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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