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  • Mice  (7)
  • Analytical Chemistry and Spectroscopy  (5)
  • 2000-2004  (4)
  • 1995-1999  (8)
  • 1
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    A TEL-JAK2 fusion protein with constitutive kinase activity in human leukemia (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-21
    Description: The Janus family of tyrosine kinases (JAK) plays an essential role in development and in coupling cytokine receptors to downstream intracellular signaling events. A t(9;12)(p24;p13) chromosomal translocation in a T cell childhood acute lymphoblastic leukemia patient was characterized and shown to fuse the 3' portion of JAK2 to the 5' region of TEL, a gene encoding a member of the ETS transcription factor family. The TEL-JAK2 fusion protein includes the catalytic domain of JAK2 and the TEL-specific oligomerization domain. TEL-induced oligomerization of TEL-JAK2 resulted in the constitutive activation of its tyrosine kinase activity and conferred cytokine-independent proliferation to the interleukin-3-dependent Ba/F3 hematopoietic cell line.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lacronique, V -- Boureux, A -- Valle, V D -- Poirel, H -- Quang, C T -- Mauchauffe, M -- Berthou, C -- Lessard, M -- Berger, R -- Ghysdael, J -- Bernard, O A -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1309-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U 301 de l'Institut National de la Sante et de la Recherche Medicale and SD 401 No. 301 CNRS, Institut de Genetique Moleculaire, 27 rue Juliette Dodu, 75010 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360930" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Biopolymers ; Cell Division ; Cell Line ; Child, Preschool ; DNA-Binding Proteins/chemistry/genetics/metabolism ; Enzyme Activation ; Humans ; Interleukin-3/physiology ; Janus Kinase 2 ; Leukemia-Lymphoma, Adult T-Cell/genetics/*metabolism ; Male ; Mice ; *Milk Proteins ; Molecular Sequence Data ; Oncogene Proteins, Fusion/chemistry/genetics/*metabolism ; Phosphorylation ; Protein-Tyrosine Kinases/chemistry/genetics/*metabolism ; *Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-ets ; *Repressor Proteins ; STAT5 Transcription Factor ; Signal Transduction ; Trans-Activators/metabolism ; Transcription Factors/chemistry/genetics/metabolism ; Transfection ; Translocation, Genetic
    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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    Evolutionary medicine: from dwarf model systems to healthy centenarians? (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-01
    Description: Restriction of the number of calories consumed extends longevity in many organisms. In rodents, caloric restriction decreases the levels of plasma glucose and insulin-like growth factor I (IGF-1) and postpones or attenuates cancer, immunosenescence, and inflammation without irreversible side effects. In organisms ranging from yeast to mice, mutations in glucose or IGF-I-like signaling pathways extend life-span but also cause glycogen or fat accumulation and dwarfism. This information suggests a new category of drugs that could prevent or postpone diseases of aging with few adverse effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Longo, Valter D -- Finch, Caleb E -- AG 01028/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2003 Feb 28;299(5611):1342-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Andrus Gerontology Center, Division of Biogerontology, and Department of Biological Sciences, University of Southern California, 3715 McClintock Avenue, Los Angeles, CA 90089-0191, USA. vlongo@usc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12610293" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Biological Evolution ; Caenorhabditis elegans/genetics/physiology ; Caloric Restriction ; Drosophila/genetics/physiology ; Dwarfism/physiopathology ; Gene Expression Regulation ; Glucose/*metabolism ; Growth Hormone/metabolism ; Human Growth Hormone/metabolism ; Humans ; Insulin-Like Growth Factor I/*metabolism ; *Longevity/genetics ; Mice ; Models, Animal ; Mutation ; Signal Transduction ; Yeasts/genetics/physiology
    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
    Electronic Resource
    Electronic Resource
    Intramolecular aromatic substitution and amino-Claisen rearrangement in substituted N-(2-propynyl)anilines on electron impact (1995)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 30 (1995), S. 1028-1033 
    Details
    ISSN: 1076-5174
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: N-(2-Propynyl)anilines undergo amino-Claisen rearrangement to a minor extent in the ion source, losing a molecule of HCN under electron impact conditions. However, metastable molecular ions with energies closer to threshold undergo Claisen rearrangement giving rise to more abundant [M - HCN]+· ions in the first field-free region. Loss of a hydrogen from the molecular ion gives rise to the base peak in the mass spectrum of N-(2-propynyl)aniline. The hydrogen that is expelled for the formation of the [M - H]+ ion is observed to be from the amino nitrogen, propargylic carbon and the ortho-carbon of the ring. The last process leads to a cyclic fragment involving intramolecular aromatic substitution. Double oxygen migration from the nitro group to the triple bond, due to the ortho effect, yields an abundant ion at m/z 105 in N-(2-propynyl)-o-nitroaniline. The proposed fragmentation pathways and ion structures are substantiated by high-resolution data, B/E and B2/E linked-scan spectra, collisionally activated dissociation-B/E linked-scan spectra and deuterium isotopic labelling.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jms.1190300713
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  • 4
    Electronic Resource
    Electronic Resource
    Dual ortho interaction in 2-substituted-3-(2-methylphenyl)-4(3H)-quinazolinones and their thio analogues under electron impact conditionsDedicated to Professor C. N. Pillai, Department of Chemistry, Indian Institute of Technology, Madras, on the occasion of his 60th birthday. (1995)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 30 (1995), S. 262-268 
    Details
    ISSN: 1076-5174
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Competing ortho interactions, involving the C=X and the ortho-methyl substituent on the 3-phenyl moiety, resulting in the eliminations of ·CH3 and ·OH/·SH from the molecular ions of 2-substituted-3-(2-methylphenyl)-4(3H)-quinazolinones and their thio analogues, were observed. An intramolecular aromatic substitution of the heteroatom of C=X at the ortho-carbon of the 3-phenyl moiety ejecting the methyl group and a hydrogen transfer from the same ortho-methyl substituent to the heteroatom of C=X resulting in the expulsion of ·XH are envisaged for the dual ortho interaction. Another expected fragmentation process observed in these compounds is the transfer of the aryl group from the 3-position of the heterocycle to the heteroatom of C=X leading to the elimination of ArX· from the molecular ions. The proposed fragmentation processes and the ion structures are supported by high-resolution data, B/E and B2/E linked-scan spectra, collisionally activated decomposition B/E spectra and deuterium isotopic labelling.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jms.1190300206
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  • 5
    Electronic Resource
    Electronic Resource
    Cycloreversal reaction and ortho interactions in 2-aryl-4H-3, 1-benzoxazin-4-ones on electron impact (1995)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 30 (1995), S. 1195-1200 
    Details
    ISSN: 1076-5174
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A cycloreversal reaction, leading to aroyl cations, is the major process in 2-aryl-4H-3,1-benzoxazin-4-ones under electron impact conditions. The ortho interaction of the methoxy and the nitro groups in the 2-phenyl moieties in these compounds present the most abundant ions at m/z 119 and 134, respectively, in their mass spectra as a result of the transfer of a hydrogen atom from the former and an oxygen atom from the latter to the imine nitrogen of the heterocycle. The ion structures and the mechanisms for the proposed fragmentations are based on high-resolution data, B/E and B2/E linked-scan spectra, collision-activated decomposition-B-/E linked-scan spectra and deuterium labelling.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jms.1190300818
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  • 6
    Electronic Resource
    Electronic Resource
    Coherent and incoherent scattering of 42.75 and 47.24 keV x-ray photons scattered from Al, Cu, Y, Mo, Au and Pb (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 24 (1995), S. 172-176 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Using nearly monoenergetic unpolarized Kα x-ray photons, measurements were made of the coherent and Compton scattered intensity in the atomic region 13 ≤ Z ≤ 82 at an angle of 90° with a high-resolution Si(Li) detection system. In order to improve the efficiency of the detection system, the excitation source, detector and the sample assembly were placed in a vacuum chamber and a pressure of 10-2 mbar was maintained throughout the measurements. Experimental scattering cross-sections are compared with the normalized integrated cross-sections based on form factor and incoherent scattering functions. Experimental coherent scattering cross-sections are higher than the theoretical values, indicating the resonance behaviour, fine structure effects and oscillation of coherent intensity around the absorption edges. Experimental incoherent scattering cross-sections are lower than the theoretical estimates for heavy elements, indicating the effect of electron binding at low photon energies.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300240406
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  • 7
    Electronic Resource
    Electronic Resource
    L x-ray fluorescence cross-sections in the atomic region 62 ≤ Z ≤ 70 excited by 15.20, 17.80, 23.62 and 24.68 keV photons (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 24 (1995), S. 244-248 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: L x-ray fluorescence cross-sections were measured for the elements Sm, Ho and Yb using photon energies of 15.20, 17.80, 23.62 and 24.68 keV. Measurements were performed using an x-ray tube with a modified exciter system as the excitation source. In order to improve the efficiency of the detection system, the excitation source, the sample and the detector assembly were placed in a vacuum chamber and a pressure of 10-2 mbar was maintained through-out the measurements. The present system considerably reduced the scattering and background effects and improved the monochromaticity. The x-ray transitions were chosen on the basis of experimentally observed spectra and a particular goup of x-rays are included in the calculation of fractional x-ray emission rates. The experimental results were in excellent agreement with theoretical values.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300240506
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  • 8
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    FADD: essential for embryo development and signaling from some, but not all, inducers of apoptosis (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-04-16
    Description: FADD (also known as Mort-1) is a signal transducer downstream of cell death receptor CD95 (also called Fas). CD95, tumor necrosis factor receptor type 1 (TNFR-1), and death receptor 3 (DR3) did not induce apoptosis in FADD-deficient embryonic fibroblasts, whereas DR4, oncogenes E1A and c-myc, and chemotherapeutic agent adriamycin did. Mice with a deletion in the FADD gene did not survive beyond day 11.5 of embryogenesis; these mice showed signs of cardiac failure and abdominal hemorrhage. Chimeric embryos showing a high contribution of FADD null mutant cells to the heart reproduce the phenotype of FADD-deficient mutants. Thus, not only death receptors, but also receptors that couple to developmental programs, may use FADD for signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yeh, W C -- de la Pompa, J L -- McCurrach, M E -- Shu, H B -- Elia, A J -- Shahinian, A -- Ng, M -- Wakeham, A -- Khoo, W -- Mitchell, K -- El-Deiry, W S -- Lowe, S W -- Goeddel, D V -- Mak, T W -- CA13106/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1998 Mar 20;279(5358):1954-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Amgen Institute, University of Toronto, Toronto, Ontario, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9506948" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Animals ; Antigens, CD95/genetics/physiology ; *Apoptosis ; Carrier Proteins/genetics/*physiology ; Cell Transformation, Neoplastic ; Cells, Cultured ; Doxorubicin/pharmacology ; *Embryonic and Fetal Development ; Endothelium, Vascular/embryology ; Fas-Associated Death Domain Protein ; Female ; Gene Expression ; Gene Targeting ; Heart/*embryology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mutation ; Oncogenes ; Receptors, Tumor Necrosis Factor/genetics/physiology ; Signal Transduction ; Tumor Necrosis Factor-alpha/pharmacology
    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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  • 9
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    Defective lymphotoxin-beta receptor-induced NF-kappaB transcriptional activity in NIK-deficient mice (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-17
    Description: The role of NF-kappaB-inducing kinase (NIK) in cytokine signaling remains controversial. To identify the physiologic functions of NIK, we disrupted the NIK locus by gene targeting. Although NIK-/- mice displayed abnormalities in both lymphoid tissue development and antibody responses, NIK-/- cells manifested normal NF-kappaB DNA binding activity when treated with a variety of cytokines, including tumor necrosis factor (TNF), interleukin-1 (IL-1), and lymphotoxin-beta (LTbeta). However, NIK was selectively required for gene transcription induced through ligation of LTbeta receptor but not TNF receptors. These results reveal that NIK regulates the transcriptional activity of NF-kappaB in a receptor-restricted manner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yin, L -- Wu, L -- Wesche, H -- Arthur, C D -- White, J M -- Goeddel, D V -- Schreiber, R D -- New York, N.Y. -- Science. 2001 Mar 16;291(5511):2162-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Immunology, Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11251123" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; B-Lymphocytes/metabolism ; Cells, Cultured ; DNA/metabolism ; Fibroblasts/metabolism ; Gene Targeting ; Genes, Reporter ; Interleukin-1/metabolism/pharmacology ; Ligands ; Lymphoid Tissue/abnormalities ; Lymphotoxin beta Receptor ; Mice ; Mice, Inbred C57BL ; NF-kappa B/genetics/*metabolism ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Receptors, Tumor Necrosis Factor/immunology/*metabolism ; Signal Transduction ; *Transcription, Genetic ; Tumor Necrosis Factor-alpha/metabolism/pharmacology
    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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  • 10
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    Semaphorin 3E and plexin-D1 control vascular pattern independently of neuropilins (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-11-20
    Description: The development of a patterned vasculature is essential for normal organogenesis. We found that signaling by semaphorin 3E (Sema3E) and its receptor plexin-D1 controls endothelial cell positioning and the patterning of the developing vasculature in the mouse. Sema3E is highly expressed in developing somites, where it acts as a repulsive cue for plexin-D1-expressing endothelial cells of adjacent intersomitic vessels. Sema3E-plexin-D1 signaling did not require neuropilins, which were previously presumed to be obligate Sema3 coreceptors. Moreover, genetic ablation of Sema3E or plexin-D1 but not neuropilin-mediated Sema3 signaling disrupted vascular patterning. These findings reveal an unexpected semaphorin signaling pathway and define a mechanism for controlling vascular patterning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gu, Chenghua -- Yoshida, Yutaka -- Livet, Jean -- Reimert, Dorothy V -- Mann, Fanny -- Merte, Janna -- Henderson, Christopher E -- Jessell, Thomas M -- Kolodkin, Alex L -- Ginty, David D -- CA23767-24/CA/NCI NIH HHS/ -- MH59199-06/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2005 Jan 14;307(5707):265-8. Epub 2004 Nov 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205-2185, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15550623" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Blood Vessels/*embryology/metabolism ; Body Patterning ; COS Cells ; Cercopithecus aethiops ; Chick Embryo ; Endothelial Cells/cytology/physiology ; Endothelium, Vascular/cytology/embryology ; Glycoproteins/*metabolism ; In Situ Hybridization ; Ligands ; Membrane Glycoproteins/*metabolism ; Membrane Proteins/*metabolism ; Mice ; Morphogenesis ; Mutation ; Nerve Tissue Proteins/*metabolism ; Neuropilin-1/metabolism ; Neuropilin-2/metabolism ; Phenotype ; Protein Binding ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Somites/*metabolism ; Transfection
    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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