Abstract
Pinnipeds (Otariidae, Odobenidae, and Phocidae) in the order Carnivora have one or two types (Hb I and Hb II) of hemoglobin components. These hemoglobins consist of identicalβ chains and differentα chains. We determined the complete amino acid sequences of the hemoglobinβ chain of three species of Otariidae (Australian sea lion, South American sea lion, and northern sea lion) and two species of Phocidae (ringed seal and harp seal) from intactβ chain and chemical cleavage fragments. The sequences are similar toβ chains of the already known sequences of pinnipeds. These sequences were compared with those of other carnivores (Mustelidae, Ursidae, Canidae, and Felidae) and adult human hemoglobinβ chain. Using Artiodactyla (pig) as an outgroup, we find that the tree constructed by means of phylogenetic analysis shows that Odobenidae is closest to Otariidae, and that Otariidae and Odobenidae are closer to Mustelidae than to Phocidae.
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Ikehara, T., Eguchi, Y., Kayo, S. et al. Amino acid sequences of hemoglobin β chains of five species of pinnipeds:Neophoca cinerea, Otaria byronia, Eumetopias jubatus, Pusa hispida, andPagophilus groenlandica. J Protein Chem 15, 659–665 (1996). https://doi.org/10.1007/BF01886748
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DOI: https://doi.org/10.1007/BF01886748