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  • 1
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    Insulin staining of ES cell progeny from insulin uptake (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-01-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rajagopal, Jayaraj -- Anderson, William J -- Kume, Shoen -- Martinez, Olga I -- Melton, Douglas A -- New York, N.Y. -- Science. 2003 Jan 17;299(5605):363.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Howard Hughes Medical Institute, Harvard University, 7 Divinity Avenue, Cambridge, MA 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12532008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/immunology ; Apoptosis ; Cell Differentiation ; Cell Line ; Embryo, Mammalian/*cytology ; Humans ; Insulin/*analysis/genetics/immunology/*metabolism ; Islets of Langerhans/*cytology/metabolism ; Mice ; Microscopy, Confocal ; RNA, Messenger/genetics/metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Stem Cells/*cytology/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Role of inositol 1,4,5-trisphosphate receptor in ventral signaling in Xenopus embryos (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-01-07
    Description: The inositol 1,4,5-trisphosphate (IP3) receptor is a calcium ion channel involved in the release of free Ca2+ from intracellular stores. For analysis of the role of IP3-induced Ca2+ release (IICR) on patterning of the embryonic body, monoclonal antibodies that inhibit IICR were produced. Injection of these blocking antibodies into the ventral part of early Xenopus embryos induced modest dorsal differentiation. A close correlation between IICR blocking potencies and ectopic dorsal axis induction frequency suggests that an active IP3-Ca2+ signal may participate in the modulation of ventral differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kume, S -- Muto, A -- Inoue, T -- Suga, K -- Okano, H -- Mikoshiba, K -- New York, N.Y. -- Science. 1997 Dec 12;278(5345):1940-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mikoshiba Calciosignal Net Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Corporation (JST), 2-9-3 Shimo-Meguro, Meguro-ku, Tokyo 153, Japan. skume@ims.u-tokyo.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9395395" target="_blank"〉PubMed〈/a〉
    Keywords: Activins ; Animals ; Antibodies, Blocking ; Antibodies, Monoclonal ; *Body Patterning ; Calcium/*metabolism ; Calcium Channels/immunology/*metabolism ; Cell Differentiation ; Embryo, Nonmammalian/*metabolism ; Embryonic Development ; Embryonic Induction ; Fibroblast Growth Factor 2/pharmacology ; Gastrula/metabolism ; Gene Expression Regulation, Developmental ; Inhibins/pharmacology ; Inositol 1,4,5-Trisphosphate/*metabolism ; Inositol 1,4,5-Trisphosphate Receptors ; Receptors, Cytoplasmic and Nuclear/immunology/*metabolism ; *Signal Transduction ; Xenopus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Activation of the G protein Gq/11 through tyrosine phosphorylation of the alpha subunit (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-20
    Description: Various receptors coupled to the heterotrimeric guanine nucleotide-binding protein Gq/11 stimulate formation of inositol-1,4,5-trisphosphate (IP3). Activation of these receptors also induces protein tyrosine phosphorylation. Formation of IP3 in response to stimulated receptors that couple to Gq/11 was blocked by protein tyrosine kinase inhibitors. These inhibitors appeared to act before activation of Gq/11. Moreover, stimulation of receptors coupled to Gq/11 induced phosphorylation on a tyrosine residue (Tyr356) of the Galphaq/11 subunit, and this tyrosine phosphorylation event was essential for Gq/11 activation. Tyrosine phosphorylation of Galphaq/11 induced changes in its interaction with receptors. Therefore, tyrosine phosphorylation of Galphaq/11 appears to regulate the activation of Gq/11 protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Umemori, H -- Inoue, T -- Kume, S -- Sekiyama, N -- Nagao, M -- Itoh, H -- Nakanishi, S -- Mikoshiba, K -- Yamamoto, T -- New York, N.Y. -- Science. 1997 Jun 20;276(5320):1878-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Oncology, Institute of Medical Science, University of Tokyo, Tokyo 108, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9188537" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CHO Cells ; Calcium/metabolism ; Carbachol/pharmacology ; Cell Line ; Cricetinae ; Enzyme Inhibitors/pharmacology ; GTP-Binding Proteins/*metabolism ; Genistein ; Inositol 1,4,5-Trisphosphate/metabolism ; Isoflavones/pharmacology ; Phosphorylation ; Phosphotyrosine/*metabolism ; Protein-Tyrosine Kinases/antagonists & inhibitors/metabolism ; Receptors, Cholinergic/*metabolism ; Receptors, Metabotropic Glutamate/*metabolism ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    A monoclonal anti-human platelet antibody: a new platelet aggregating substance (1985)
    American Society of Hematology
    Details
    Publication Date: 1985-02-01
    Description: A monoclonal anti-human platelet antibody, TP82, is described, which caused irreversible aggregation of platelets in association with the release of adenosine triphosphate or [14C] serotonin, and which inhibited ristocetin-induced agglutination. Immunofluorescence assay showed that the antibody binds to platelets, megakaryocytes, and common acute lymphoblastic leukemia cells. The antibody (IgG1) immunoprecipitated a polypeptide of 23,000 daltons with an isoelectric point of about 7.0. The aggregation induced by the purified antibody and/or F(ab')2 fragments occurred in platelet-rich plasma and with washed platelets, but not with formalin-fixed washed platelets. TP82- induced aggregation was completely inhibited by disodium ethylendiaminotetraacetate, diltiazem, W-7, PGE1, and several metabolic inhibitors. At a concentration of apyrase or CP/CPK, which inhibited adenosine 5-diphosphate-induced aggregation. TP82-induced aggregation was only partially affected. Thrombin was not required for the antibody- mediated effects, since two thrombin inhibitors failed to block the reaction. The antibody, at least at a high concentration, induced platelet aggregation by a mechanism almost independent of thromboxane A2 formation, since cyclooxygenase inhibitors had little inhibitory effect on aggregation. TP82 monoclonal antibody is a new platelet- aggregating substance that interacts with a low-molecular-weight binding site on the platelet membrane.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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  • 5
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    A monoclonal anti-human platelet antibody: a new platelet aggregating substance (1985)
    American Society of Hematology
    Details
    Publication Date: 1985-02-01
    Description: A monoclonal anti-human platelet antibody, TP82, is described, which caused irreversible aggregation of platelets in association with the release of adenosine triphosphate or [14C] serotonin, and which inhibited ristocetin-induced agglutination. Immunofluorescence assay showed that the antibody binds to platelets, megakaryocytes, and common acute lymphoblastic leukemia cells. The antibody (IgG1) immunoprecipitated a polypeptide of 23,000 daltons with an isoelectric point of about 7.0. The aggregation induced by the purified antibody and/or F(ab')2 fragments occurred in platelet-rich plasma and with washed platelets, but not with formalin-fixed washed platelets. TP82- induced aggregation was completely inhibited by disodium ethylendiaminotetraacetate, diltiazem, W-7, PGE1, and several metabolic inhibitors. At a concentration of apyrase or CP/CPK, which inhibited adenosine 5-diphosphate-induced aggregation. TP82-induced aggregation was only partially affected. Thrombin was not required for the antibody- mediated effects, since two thrombin inhibitors failed to block the reaction. The antibody, at least at a high concentration, induced platelet aggregation by a mechanism almost independent of thromboxane A2 formation, since cyclooxygenase inhibitors had little inhibitory effect on aggregation. TP82 monoclonal antibody is a new platelet- aggregating substance that interacts with a low-molecular-weight binding site on the platelet membrane.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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