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  • Binding Sites
  • American Association for the Advancement of Science (AAAS)  (13)
  • American Association of Petroleum Geologists (AAPG)
  • 1975-1979  (13)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (13)
  • American Association of Petroleum Geologists (AAPG)
Years
Year
  • 1
    Publication Date: 1979-12-07
    Description: A laser-induced luminescence technique is introduced for probing the structure and equilibria of lanthanide complexes and lanthanide ion binding to macromolecules. The method involves the excitation of the 7F0 leads to 5D0 transition between nondegenerate levels in the europium(III) ion by means of an intense pulsed dye laser source. Excitation profits obtained by scanning the laser through the transition region reveal distinct peaks characteristic of individual europium(III) ion environments. The technique may be used to characterize the species present in complex equilibria in solution or to study europium(III) binding to macromolecules. Distinct europium(III) binding sites in thermolysin with long and short excited state lifetimes are observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horrocks, W D Jr -- Sudnick, D R -- New York, N.Y. -- Science. 1979 Dec 7;206(4423):1194-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/505007" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; *Europium ; Luminescence ; Protein Binding ; Spectrum Analysis/methods ; Thermolysin
    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
    Publication Date: 1979-02-09
    Description: A sensitive and specific radioimmunoassay for the insulin receptor has been developed employing receptor autoantibodies from the serum of a patient with insulin-resistant diabetes. The assay detects insulin binding sites at concentrations as low as 0.1 nanomolar; distinguishes between receptors originating from human placental membranes, human lymphoblastoid cells, and mouse liver membranes; and measures the receptor independently of its binding function. Down-regulation, or loss of binding after exposure to insulin, is associated with loss of immunoreactive receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrison, L C -- Flier, J -- Itin, A -- Kahn, C R -- Roth, J -- New York, N.Y. -- Science. 1979 Feb 9;203(4380):544-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/83675" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Antibody Reactions ; Binding Sites ; Binding Sites, Antibody ; Epitopes ; Female ; Humans ; Liver/analysis ; Lymphocytes/analysis ; Mice ; Placenta/analysis ; Pregnancy ; Radioimmunoassay/methods ; Receptor, Insulin/analysis/*immunology ; Solubility
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-13
    Description: Removal of fibrinopeptide B from human fibrinogen by reaction with the procoagulant enzyme from copperhead snake venom below 25 degrees C resulted in tight aggregation of the fibrinogen, which, in turn, progressively blocked a concomitant but sluggish release of fibrinopeptide A by the enzyme. When the clots obtained at less than 25 degrees C were warmed, they dissociated into soluble aggregates and monomers. Release of fibrinopeptide A then resumed, and a secondary coagulation followed. The aggregation induced by release of fibrinopeptide B itself involves a plasmin-susceptible segment located just distal to B in the B beta chain of fibrinogen, a segment previously shown to be of little importance in the aggregation induced by release of fibrinopeptide A.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shainoff, J R -- Dardik, B N -- New York, N.Y. -- Science. 1979 Apr 13;204(4389):200-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/155308" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Crotalid Venoms/*metabolism ; Fibrinogen/*metabolism ; Fibrinolysin/metabolism ; Fibrinopeptide A/metabolism ; Fibrinopeptide B/*metabolism ; Humans ; Molecular Weight ; Protein Binding ; Temperature
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-27
    Description: Space-filling models of yeast hexokinase, adenylate kinase, and phosphoglycerate kinase drawn by computer clearly portray the bilobal character of these phosphoryl transfer enzymes, and the deep cleft which is formed between the lobes. A dramatic conformational change occurs in hexokinase as glucose binds to the bottom of the cleft, which causes the two lobes of hexokinase to come together. A substrate-induced closing of the active site cleft is postulated to occur in other kinases as well. This change may provide a mechanism by which some of these enzymes reduce their inherent adenosine triphosphatase activity and could be a general requirement of the kinase reaction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, C M -- Zucker, F H -- Steitz, T A -- New York, N.Y. -- Science. 1979 Apr 27;204(4391):375-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/220706" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylate Kinase ; Binding Sites ; Catalysis ; Hexokinase ; Models, Molecular ; Phosphoglycerate Kinase ; *Phosphotransferases ; Protein Conformation ; Saccharomyces cerevisiae/enzymology ; Structure-Activity Relationship
    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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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-01-12
    Description: Both normal human serum and supernatant from explanted malignant tumors contained a heat-stable low-molecular-weight factor that inhibited monocyte activation in vitro. In contrast, serum from individuals with solid tumors enhanced monocyte activation. It is suggested that the systemic activation of monocytes that occurs in malignant disease may be an appropriate host response but that successful tumors may continue to grow because they subvert the normal physiological signal for inhibition of macrophage activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rhodes, J -- Bishop, M -- Benfield, J -- New York, N.Y. -- Science. 1979 Jan 12;203(4376):179-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/758686" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Carcinoma/*immunology ; Carcinoma, Squamous Cell/immunology ; Chemotaxis ; Colonic Neoplasms/*immunology ; Humans ; Immunity, Cellular ; Immunoglobulin Fc Fragments ; Lung Neoplasms/*immunology ; Macrophages/*immunology ; Monocytes/*immunology ; Rosette Formation
    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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  • 6
    Publication Date: 1979-09-21
    Description: The bis-acridine ring system forms the basis for new biophysical probes of novel stereochemistry. Spectral data indicate that certain alkylene bridged bis-9-aminoacridines have a parallel plane conformation of predictable interplane distance. The parallel plane conformation is independent of solvent and thus is different from nucleic acid systems. This stable conformation allows these compounds to be used as sensitive "rulers" for describing binding site geometry in cholinergic enzymes and in the delineation of the mechanism of allosteric control in acetylcholinesterase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Himel, C M -- Taylor, J L -- Pape, C -- Millar, D B -- Christopher, J -- Kurlansik, L -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1277-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472743" target="_blank"〉PubMed〈/a〉
    Keywords: *Acetylcholinesterase/metabolism ; *Acridines ; Binding Sites ; Kinetics ; Molecular Conformation ; Phosphorylation ; Protein Conformation ; Spectrophotometry, Ultraviolet
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-02-09
    Description: Like physicists striving to develop a unified field theory, immunologists are attempting to bring order to the microcosmos of defense reactions. Indications are that one of the most important constants in this microcosmos is the major histocompatibility complex (MHC) of the species. A test of any interpretation of the MHC's role in immunity is how well it explains this system's polymorphism. One of the most crucial questions an MHC hypothesis must answer is: Why are there so many alleles at this complex?〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klein, J -- New York, N.Y. -- Science. 1979 Feb 9;203(4380):516-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/104386" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Blood Proteins/genetics ; Genes ; *Genes, MHC Class II ; Genetic Linkage ; H-2 Antigens/*genetics ; Lymphocytes/immunology ; *Major Histocompatibility Complex ; Mice/*immunology ; Phenotype ; Polymorphism, Genetic
    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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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-05-04
    Description: Estradiol-binding proteins with the properties of putative estrogen receptors are present in cytosol extracts of embryonic mouse hypothalamus and other brain regions. These embryonic estrogen receptors are adultlike in their high affinity and limited capacity for estradiol, sensitivity to diethylstilbestrol, ability to adhere to DNA, and behavior during DNA-cellulose affinity chromatography. As early as 4 days before birth, mouse hypothalamus has approximately 40 percent of the adult concentration of hypothalamic estrogen receptors with these properties. These observations raise the possibility that embryonic rodent brain has the biochemical potential to respond to sex hormones and that the critical period of brain sexual differentiation could be initiated prenatally.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vito, C C -- Fox, T O -- New York, N.Y. -- Science. 1979 May 4;204(4392):517-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432656" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Binding Sites ; Brain/*embryology ; Chromatography, Affinity ; Cytosol/metabolism ; Hypothalamus/embryology ; Mice ; Receptors, Estrogen/*metabolism ; Sexual Maturation
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-08
    Description: The reactive superoxide radical, O2-, formerly of concern only to radiation chemists and radiobiologists, is now understood to be a normal product of the biological reduction of molecular oxygen. An unusual family of enzymes, the superoxide dismutases, protect against the deleterious actions of this radical by catalyzing its dismutation to hydrogen peroxide plus oxygen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fridovich, I -- New York, N.Y. -- Science. 1978 Sep 8;201(4359):875-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/210504" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Catalase/metabolism ; Free Radicals ; Inflammation/metabolism ; Kinetics ; Metals ; Oxidation-Reduction ; Oxygen/*metabolism ; Paraquat/pharmacology ; Peroxidases/metabolism ; Superoxide Dismutase/*metabolism ; Superoxides/*metabolism/toxicity
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 1978-06-16
    Description: Throbin-activated human platelets cause agglutination of trypsinized, formalinized bovine erythrocytes. This lectin activity of stimulated platelets was blocked by galactosamine, glucosamine, mannosamine, lysine, and arginine, but not by N-acetylated sugars, other neutral sugars, or other amino acids. Inhibitors of the thrombin-induced lectin activity also blocked thrombin-induced platelet aggregation. It appears that a membrane surface component that has lectin activity mediates platelet aggregation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gartner, T K -- Williams, D C -- Minion, F C -- Phillips, D R -- New York, N.Y. -- Science. 1978 Jun 16;200(4347):1281-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663608" target="_blank"〉PubMed〈/a〉
    Keywords: *Agglutinins ; Amino Acids/pharmacology ; Amino Sugars/pharmacology ; Animals ; Binding Sites ; Cytochalasin B/pharmacology ; *Hemagglutinins ; Humans ; Membrane Proteins/blood ; Platelet Aggregation/*drug effects ; Prostaglandins E/pharmacology ; Species Specificity ; Thrombin/*pharmacology
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-11-24
    Description: Seizures induced in the rat by electroshock or by injections of pentylenetetrazol increase the specific binding of diazepam to putative receptor sites in cerebral cortical membranes. The enhancement of diazepam binding results from a rapid increase in the number of available binding sites rather than a change in receptor affinity. The postictal increase in cortical benzodiazepine receptors suggests that the cerebral cortex might be more sensitive to the anticonvulsant effects of the benzodiazepines after seizures. This observation may be related to the mechanism of action of these drugs in the treatment of recurrent seizures such as status epilepticus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, S M -- Skolnick, P -- New York, N.Y. -- Science. 1978 Nov 24;202(4370):892-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/715447" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anoxia/metabolism ; Binding Sites ; Brain/*metabolism ; Cerebral Cortex/metabolism ; Diazepam/*metabolism ; Electroshock ; Kinetics ; Male ; Pentylenetetrazole ; Rats ; Receptors, Drug/*metabolism ; Seizures/*metabolism ; Synaptosomes/metabolism
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-15
    Description: The principles of the competitive-binding assay were used in conjunction with light microscopic radioautography to demonstrate specific prolactin binding sites localized on ependyma of the rat choroid plexus, a previously unknown prolactin target tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, R J -- Posner, B I -- Kopriwa, B M -- Brawer, J R -- New York, N.Y. -- Science. 1978 Sep 15;201(4360):1041-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684427" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Binding Sites ; Binding, Competitive ; Brain/cytology/*metabolism ; Female ; Iodine Radioisotopes ; Male ; Prolactin/*metabolism ; Rats
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    Electronic ISSN: 1095-9203
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  • 13
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-06-16
    Description: Antibodies to insulin receptors purified from rat liver membranes do not complete with [125I]insulin for binding to the insulin receptor but do precipitate solubilized receptors labeled with [125I]insulin. These antibodies have the insulin-like activities of enhancing glucose oxidation and inhibiting epinephrine-induced lipolysis in rat adipocytes. Thus, antibody binds to the receptor at a different site from that to which insulin binds, yet the interaction can initiate an effective biological response. These results indicate that the previously studied insulin-binding sites are the physiological macromolecular receptors for insulin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacobs, S -- Chang, K J -- Cuatrecasas, P -- New York, N.Y. -- Science. 1978 Jun 16;200(4347):1283-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663609" target="_blank"〉PubMed〈/a〉
    Keywords: Acanthosis Nigricans/physiopathology ; Adipose Tissue/metabolism ; Animals ; *Antibodies ; Antigen-Antibody Reactions ; Binding Sites ; Binding, Competitive ; Biological Transport ; Epinephrine/pharmacology ; Glucose/metabolism ; Insulin/metabolism ; Lipid Mobilization ; Liver/immunology ; Rats ; Receptor, Insulin/*physiology
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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