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  • 1
    Electronic Resource
    Electronic Resource
    The Apparent and Partial Molal Volumes of Potassium Iodide and of Iodine in Methanol at 25° from Density Measurements (1953)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 75 (1953), S. 5219-5220 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01117a021
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Partial Molal Volumes of Potassium Chloride, Potassium and Sodium Iodides and of Iodine in Aqueous Solution at 25° (1952)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 74 (1952), S. 1017-1020 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01124a042
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Origins of immunoglobulin heavy chain domains (1980)
    Springer
    Journal of molecular evolution 15 (1980), S. 113-127 
    Details
    ISSN: 1432-1432
    Keywords: Immunoglobulin C regions ; Evolutionary trees ; Internal gene duplications ; Heavy chain domains ; Computer methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Using computer programs that analyze the evolutionary history and probability of relationship of protein sequences, we have investigated the gene duplication events that led to the present configuration of immunoglobulin C regions, with particular attention to the origins of the homology regions (domains) of the heavy chains. We conclude that all of the sequenced heavy chains share a common ancestor consisting of four domains and that the two shorter heavy chains, alpha and gamma, have independently lost most of the second domain. These conclusions allow us to align corresponding regions of these sequences for the purpose of deriving evolutionary trees. Three independent internal gene duplications are postulated to explain the observed pattern of relationships among the four domains: first a duplication of the ancestral single domain C region, followed by independent duplications of the resulting first and last domains. In these studies there was no evidence of crossing-over and recombination between ancestral chains of different classes; however, certain types of recombinations would not be detectable from the available sequence data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01732665
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  • 4
    Electronic Resource
    Electronic Resource
    A comprehensive examination of protein sequences for evidence of internal gene duplication (1978)
    Springer
    Journal of molecular evolution 10 (1978), S. 265-281 
    Details
    ISSN: 1432-1432
    Keywords: Internal Gene Duplication ; Periodic Proteins ; Computer Examination of Protein Sequences ; Ancestral Sequences ; Evolutionary Mechanisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have implemented a routine procedure for screening protein sequences for evidence of intragenic duplications. We tested 163 protein sequences representing 116 superfamilies of unrelated proteins. Twenty superfamilies contain proteins with internal gene duplications. The intragenic duplications detected can be divided into two major types. (1) One or more duplications of all or part of a gene produce a protein with two or several detectable regions of sequence homology. Sequences from 18 superfamilies contained this type of duplication. (2) Repeated reduplication of a small DNA segment can produce a protein that is repetitive over most of its length. Three superfamilies contain such repetitive sequences. We also investigated the limits of detection of ancient duplications using sequences derived by random mutation of a model sequence consisting of ten 10-residue repeats. The original repetitive nature of the sequence was usually detected after 250 point mutations even though the ancestral segment could not be accurately reconstructed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01734217
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  • 5
    Electronic Resource
    Electronic Resource
    Evolution of major metabolic innovations in the Precambrian (1982)
    Springer
    Origins of life and evolution of the biospheres 12 (1982), S. 81-91 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract A combination of the information on the metabolic capabilities of prokaryotes with a composite phylogenetic tree depicting an overview of prokaryote evolution based on the sequences of bacterial ferredoxin, 2Fe−2S ferredoxin, 5S ribosomal RNA, andc-type cytochromes shows three zones of major metabolic innovation in the Precambrian. The middle of these, which reflects the genesis of oxygenreleasing photosynthesis and aerobic respiration, links metabolic innovations of the anaerobic stem on the one hand and, on the other, proliferation of aerobic bacteria and the symbiotic associations leading to the eukaryotes. We consider especially those pathways where information on the structure of the enzymes is known.Halobacterium andThermoplasma (archaebacteria) do not belong to a totally independent line on the basis of the composite tree but branch from the eukaryote cytoplasmic line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00926914
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  • 6
    Electronic Resource
    Electronic Resource
    The chemical structure of DNA sequence signals for RNA transcription (1982)
    Springer
    Origins of life and evolution of the biospheres 12 (1982), S. 311-319 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00926902
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    Paper (German National Licenses)
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