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  • 1
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    Studies of the HER-2/neu proto-oncogene in human breast and ovarian cancer (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-05-12
    Description: Carcinoma of the breast and ovary account for one-third of all cancers occurring in women and together are responsible for approximately one-quarter of cancer-related deaths in females. The HER-2/neu proto-oncogene is amplified in 25 to 30 percent of human primary breast cancers and this alteration is associated with disease behavior. In this report, several similarities were found in the biology of HER-2/neu in breast and ovarian cancer, including a similar incidence of amplification, a direct correlation between amplification and over-expression, evidence of tumors in which overexpression occurs without amplification, and the association between gene alteration and clinical outcome. A comprehensive study of the gene and its products (RNA and protein) was simultaneously performed on a large number of both tumor types. This analysis identified several potential shortcomings of the various methods used to evaluate HER-2/neu in these diseases (Southern, Northern, and Western blots, and immunohistochemistry) and provided information regarding considerations that should be addressed when studying a gene or gene product in human tissue. The data presented further support the concept that the HER-2/neu gene may be involved in the pathogenesis of some human cancers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slamon, D J -- Godolphin, W -- Jones, L A -- Holt, J A -- Wong, S G -- Keith, D E -- Levin, W J -- Stuart, S G -- Udove, J -- Ullrich, A -- CA 36827/CA/NCI NIH HHS/ -- CA 48780/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1989 May 12;244(4905):707-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, U.C.L.A. School of Medicine 90024.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2470152" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomarkers, Tumor ; Breast Neoplasms/*genetics ; Cloning, Molecular ; DNA/analysis ; Female ; Gene Amplification ; Gene Expression Regulation ; Humans ; Immunohistochemistry ; Nucleic Acid Hybridization ; Ovarian Neoplasms/*genetics ; Prognosis ; Protein Kinases ; Proto-Oncogene Proteins/*genetics ; *Proto-Oncogenes ; RNA/analysis ; Receptor, ErbB-2
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Reversing the inactivation of peroxiredoxins caused by cysteine sulfinic acid formation (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-26
    Description: The active-site cysteine of peroxiredoxins is selectively oxidized to cysteine sulfinic acid during catalysis, which leads to inactivation of peroxidase activity. This oxidation was thought to be irreversible. However, by metabolic labeling of mammalian cells with 35S, we show that the sulfinic form of peroxiredoxin I, produced during the exposure of cells to H2O2, is rapidly reduced to the catalytically active thiol form. The mammalian cells' ability to reduce protein sulfinic acid might serve as a mechanism to repair oxidatively damaged proteins or represent a new type of cyclic modification by which the function of various proteins is regulated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Woo, Hyun Ae -- Chae, Ho Zoon -- Hwang, Sung Chul -- Yang, Kap-Seok -- Kang, Sang Won -- Kim, Kanghwa -- Rhee, Sue Goo -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):653-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cell Signaling Research and Division of Molecular Life Sciences, Ewha Womans University, Seoul 120-750, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714748" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Catalysis ; Cell Line ; Cycloheximide/pharmacology ; Cysteine/*analogs & derivatives/*metabolism ; Dimerization ; HeLa Cells ; Humans ; Hydrogen Peroxide/*metabolism ; Methionine/metabolism ; Mice ; Neurotransmitter Agents ; Oxidation-Reduction ; Peroxidases/chemistry/*metabolism ; Peroxiredoxins ; Protein Synthesis Inhibitors/pharmacology ; Spectrometry, Mass, Electrospray Ionization ; Sulfhydryl Compounds/metabolism ; Sulfinic Acids/metabolism ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Prevention of graft versus host disease by inactivation of host antigen-presenting cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-20
    Description: Graft versus host disease, an alloimmune attack on host tissues mounted by donor T cells, is the most important toxicity of allogeneic bone marrow transplantation. The mechanism by which allogeneic T cells are initially stimulated is unknown. In a murine allogeneic bone marrow transplantation model it was found that, despite the presence of numerous donor antigen-presenting cells, only host-derived antigen-presenting cells initiated graft versus host disease. Thus, strategies for preventing graft versus host disease could be developed that are based on inactivating host antigen-presenting cells. Such strategies could expand the safety and application of allogeneic bone marrow transplantation in treatment of common genetic and neoplastic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shlomchik, W D -- Couzens, M S -- Tang, C B -- McNiff, J -- Robert, M E -- Liu, J -- Shlomchik, M J -- Emerson, S G -- P50HL-54516/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):412-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10411505" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Presenting Cells/*immunology ; Bone Marrow Transplantation/adverse effects/*immunology ; CD8-Positive T-Lymphocytes/*immunology ; Dendritic Cells/immunology ; Graft vs Host Disease/immunology/*prevention & control ; H-2 Antigens/immunology ; Lymph Nodes/immunology ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Mice, Inbred Strains ; Mice, Knockout ; Minor Histocompatibility Antigens/immunology ; Spleen/immunology ; Transplantation Chimera
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Bile acids: natural ligands for an orphan nuclear receptor (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: Bile acids regulate the transcription of genes that control cholesterol homeostasis through molecular mechanisms that are poorly understood. Physiological concentrations of free and conjugated chenodeoxycholic acid, lithocholic acid, and deoxycholic acid activated the farnesoid X receptor (FXR; NR1H4), an orphan nuclear receptor. As ligands, these bile acids and their conjugates modulated interaction of FXR with a peptide derived from steroid receptor coactivator 1. These results provide evidence for a nuclear bile acid signaling pathway that may regulate cholesterol homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parks, D J -- Blanchard, S G -- Bledsoe, R K -- Chandra, G -- Consler, T G -- Kliewer, S A -- Stimmel, J B -- Willson, T M -- Zavacki, A M -- Moore, D D -- Lehmann, J M -- F32 DK09793/DK/NIDDK NIH HHS/ -- R01 DK53366/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1999 May 21;284(5418):1365-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biochemistry, Glaxo Wellcome Research and Development, Research Triangle Park NC, 27709, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334993" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bile Acids and Salts/chemistry/*metabolism/pharmacology ; Carrier Proteins/metabolism ; Cell Line ; Chenodeoxycholic Acid/*metabolism/pharmacology ; Cholesterol/metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Deoxycholic Acid/metabolism/pharmacology ; Histone Acetyltransferases ; Homeostasis ; Humans ; Ligands ; Lithocholic Acid/metabolism/pharmacology ; Mice ; Nuclear Receptor Coactivator 1 ; *Organic Anion Transporters, Sodium-Dependent ; Protein Conformation ; Receptors, Cytoplasmic and Nuclear/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Structure-Activity Relationship ; *Symporters ; Transcription Factors/chemistry/genetics/*metabolism ; Transfection
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Two-amino acid molecular switch in an epithelial morphogen that regulates binding to two distinct receptors (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-20
    Description: Ectodysplasin, a member of the tumor necrosis factor family, is encoded by the anhidrotic ectodermal dysplasia (EDA) gene. Mutations in EDA give rise to a clinical syndrome characterized by loss of hair, sweat glands, and teeth. EDA-A1 and EDA-A2 are two isoforms of ectodysplasin that differ only by an insertion of two amino acids. This insertion functions to determine receptor binding specificity, such that EDA-A1 binds only the receptor EDAR, whereas EDA-A2 binds only the related, but distinct, X-linked ectodysplasin-A2 receptor (XEDAR). In situ binding and organ culture studies indicate that EDA-A1 and EDA-A2 are differentially expressed and play a role in epidermal morphogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yan, M -- Wang, L C -- Hymowitz, S G -- Schilbach, S -- Lee, J -- Goddard, A -- de Vos, A M -- Gao, W Q -- Dixit, V M -- New York, N.Y. -- Science. 2000 Oct 20;290(5491):523-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Oncology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11039935" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Binding Sites ; Cell Line ; DNA-Binding Proteins/metabolism ; Ectodermal Dysplasia/genetics ; Ectodysplasins ; Epidermis/embryology/*metabolism ; Humans ; *I-kappa B Proteins ; In Situ Hybridization ; Ligands ; Membrane Proteins/*chemistry/*metabolism ; Mice ; Models, Molecular ; Molecular Sequence Data ; Morphogenesis ; NF-kappa B/metabolism ; Phosphorylation ; Point Mutation ; Protein Conformation ; Proteins/metabolism ; Receptors, Cell Surface/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; TNF Receptor-Associated Factor 6 ; Transfection
    Print ISSN: 0036-8075
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  • 6
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    Orbital forcing of the marine isotope stage 9 interglacial (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Milankovitch orbital forcing theory has been used to assign time scales to many paleoclimate records. However, the validity of this theory remains uncertain, and independent sea-level chronologies used to test its applicability have been restricted largely to the past approximately 135,000 years. Here, we report U-series ages for coral reefs formed on Henderson Island during sea-level high-stands occurring at approximately 630,000 and approximately 330,000 years ago. These data are consistent with the hypothesis that interglacial climates are forced by Northern Hemisphere summer solar insolation centered at 65 degrees N latitude, as predicted by Milankovitch theory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stirling, C H -- Esat, T M -- Lambeck, K -- McCulloch, M T -- Blake, S G -- Lee, D C -- Halliday, A N -- New York, N.Y. -- Science. 2001 Jan 12;291(5502):290-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA. stirling@erdw.ethz.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11209076" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Climate ; *Cnidaria/chemistry/growth & development ; Mass Spectrometry ; Pacific Islands ; Radioisotopes/analysis ; Seawater ; Thorium/analysis ; Time ; Uranium/analysis
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  • 7
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    Feedback connections to the lateral geniculate nucleus and cortical response properties (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-24
    Description: The cerebral cortex receives sensory input from the periphery by means of thalamic relay nuclei, but the flow of information goes both ways. Each cortical area sends a reciprocal projection back to the thalamus. In the visual system, the synaptic relations that govern the influence of thalamic afferents on orientation selectivity in the cortex have been studied extensively. It now appears that the connectivity of the corticofugal feedback pathway is also fundamentally linked to the orientation preference of the cortical cells involved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murphy, P C -- Duckett, S G -- Sillito, A M -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1552-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, St. George's Hospital Medical School, Tooting, London SW17 0RE, UK. p.murphy@sghms.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10567260" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/physiology/ultrastructure ; Brain Mapping ; Cats ; Feedback ; Geniculate Bodies/cytology/*physiology ; Lysine/analogs & derivatives ; Presynaptic Terminals/physiology/ultrastructure ; Visual Cortex/cytology/*physiology ; *Visual Pathways
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 8
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    Rapid and reversible effects of activity on acetylcholine receptor density at the neuromuscular junction in vivo (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: Quantitative fluorescence imaging was used to study the regulation of acetylcholine receptor (AChR) number and density at neuromuscular junctions in living adult mice. At fully functional synapses, AChRs have a half-life of about 14 days. However, 2 hours after neurotransmission was blocked, the half-life of the AChRs was now less than a day; the rate was 25 times faster than before. Most of the lost receptors were not quickly replaced. Direct muscle stimulation or restoration of synaptic transmission inhibited this process. AChRs that were removed from nonfunctional synapses resided for hours in the perijunctional membrane before being locally internalized. Dispersed AChRs could also reaggregate at the junction once neurotransmission was restored. The rapid and reversible alterations in AChR density at the neuromuscular junction in vivo parallel changes thought to occur in the central nervous system at synapses undergoing potentiation and depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Akaaboune, M -- Culican, S M -- Turney, S G -- Lichtman, J W -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):503-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, MO 63110, USA. mohammed@nmj.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521340" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bungarotoxins/pharmacology ; Cell Membrane/metabolism ; Curare/pharmacology ; Diffusion ; Electric Stimulation ; Fluorescent Dyes ; Half-Life ; Mice ; *Muscle Contraction ; Muscle Denervation ; Neuromuscular Blockade ; Neuromuscular Blocking Agents/pharmacology ; Neuromuscular Junction/*physiology ; Receptor Aggregation ; Receptors, Cholinergic/*metabolism ; Rhodamines/pharmacology ; *Synaptic Transmission
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  • 9
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    Structure of murine CTLA-4 and its role in modulating T cell responsiveness (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-29
    Description: The effective regulation of T cell responses is dependent on opposing signals transmitted through two related cell-surface receptors, CD28 and cytotoxic T lymphocyte-associated antigen 4 (CTLA-4). Dimerization of CTLA-4 is required for the formation of high-avidity complexes with B7 ligands and for transmission of signals that attenuate T cell activation. We determined the crystal structure of the extracellular portion of CTLA-4 to 2.0 angstrom resolution. CTLA-4 belongs to the immunoglobulin superfamily and displays a strand topology similar to Valpha domains, with an unusual mode of dimerization that places the B7 binding sites distal to the dimerization interface. This organization allows each CTLA-4 dimer to bind two bivalent B7 molecules and suggests that a periodic arrangement of these components within the immunological synapse may contribute to the regulation of T cell responsiveness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ostrov, D A -- Shi, W -- Schwartz, J C -- Almo, S C -- Nathenson, S G -- AI07289/AI/NIAID NIH HHS/ -- AI42970/AI/NIAID NIH HHS/ -- CA09173/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Oct 27;290(5492):816-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11052947" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Amino Acid Sequence ; Animals ; Antigen-Presenting Cells/immunology ; Antigens, CD ; Antigens, CD28/immunology/metabolism ; Antigens, CD80/chemistry/metabolism ; Antigens, Differentiation/*chemistry/*immunology/metabolism ; CTLA-4 Antigen ; Crystallography, X-Ray ; Dimerization ; Hydrogen Bonding ; *Immunoconjugates ; Ligands ; Lymphocyte Activation ; Mice ; Models, Molecular ; Molecular Sequence Data ; Protein Binding ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Receptors, Antigen, T-Cell/metabolism ; Signal Transduction ; T-Lymphocytes/*immunology
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  • 10
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    50 million years of genomic stasis in endosymbiotic bacteria (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-06-29
    Description: Comparison of two fully sequenced genomes of Buchnera aphidicola, the obligate endosymbionts of aphids, reveals the most extreme genome stability to date: no chromosome rearrangements or gene acquisitions have occurred in the past 50 to 70 million years, despite substantial sequence evolution and the inactivation and loss of individual genes. In contrast, the genomes of their closest free-living relatives, Escherichia coli and Salmonella spp., are more than 2000-fold more labile in content and gene order. The genomic stasis of B. aphidicola, likely attributable to the loss of phages, repeated sequences, and recA, indicates that B. aphidicola is no longer a source of ecological innovation for its hosts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tamas, Ivica -- Klasson, Lisa -- Canback, Bjorn -- Naslund, A Kristina -- Eriksson, Ann-Sofie -- Wernegreen, Jennifer J -- Sandstrom, Jonas P -- Moran, Nancy A -- Andersson, Siv G E -- New York, N.Y. -- Science. 2002 Jun 28;296(5577):2376-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Evolution, Evolutionary Biology Center, University of Uppsala, Uppsala, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12089438" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aphids/*microbiology/physiology ; Bacterial Proteins/chemistry/genetics ; Biological Evolution ; Buchnera/*genetics/physiology ; DNA, Intergenic ; Diet ; Ecosystem ; Escherichia coli/genetics ; *Evolution, Molecular ; Genes, Bacterial ; Genetic Variation ; *Genome, Bacterial ; Molecular Sequence Data ; Mutation ; Operon ; Pseudogenes ; Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Salmonella typhimurium/genetics ; Species Specificity ; *Symbiosis
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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