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  • 1
    Electronic Resource
    Electronic Resource
    A cladistic phylogeny of the genus Littorina (Gastropoda): implications for evolution of reproductive strategies and for classification (1990)
    Springer
    Hydrobiologia 193 (1990), S. 1-19 
    Details
    ISSN: 1573-5117
    Keywords: biogeography ; Atlantic ; Pacific ; reproductive strategy ; larval development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gross anatomical characters of all 18 species of Littorina are used to construct a phylogenetic hypothesis for the genus, by the method of cladistic analysis. The resulting cladogram suggests that of the four subgenera of Littorina, one (Littorina) is paraphyletic. It is uncertain whether the genus Mainwaringia should be included in Littorina. It is shown that the non-planktotrophic Littorina species in the northern Atlantic comprise a monophyletic group, with the sister-species L. kurila and/or L. subrotundata in the northern Pacific. Invasion of the Atlantic by a minimum of two Pacific species, across the Arctic migration route established during the late Cenozoic, is sufficient to account for the modern distribution of the subgenera Littorina and Neritrema. The importance of the cladogram as a basis for hypotheses of adaptation is illustrated by a discussion of spawn and development in Littorina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028062
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    113Cd NMR spectra of human serum transferrin (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. S110 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 113Cd NMR ; Transferrin ; Hydrogencarbonate ; N-lobe ; C-lobe ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The binding of Cd2+ to human serum transferrin (80 kDa) was studied by 113Cd NMR spectroscopy. At pH 7 in the presence of hydrogen-carbonate as synergistic anion, two resonances of similar intensity at 38.1 and 43.6 ppm were observed, consistent with Cd2+ binding to oxygen ligands and one nitrogen ligand in the specific metal-binding clefts of the N- and C-lobes of the protein.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260311321
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    Paper (German National Licenses)
    Fulltext
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