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The primary structure of hemoglobins from the domestic cat (Felis catus, Felidae)


Biological Chemistry Hoppe-Seyler 366(8): 699-704
The primary structure of hemoglobins from the domestic cat (Felis catus, Felidae)
The complete primary structure of the two hemoglobin components of the domestic cat (Felis catus) is presented. The major component (A) accounts for 60-70% whereas the minor component (B) constitutes 30-40% of the total hemoglobin. Separation of the polypeptides was carried out in buffers containing 8M urea on CM-Cellulose. The sequence was studied by Edman degradation of tryptic and cyanogen bromide cleavage products in a liquid phase sequencer. The sequence is compared for homology with human hemoglobin. The beta-chain of the minor components (beta B) has a blocked N-terminal residue identified as acetylserine whereas that of the major component (beta A) is free glycine. The two hemoglobins have identical alpha-chains and differ with respect to their beta-chains at the following positions (beta B/beta A): beta NA1 Ac-Ser/Gly, beta A1 Ser/Thr, beta H17 Ser/Asn and beta HC1 Arg/Lys. The structural and functional aspects of these exchanges are discussed.


Accession: 006740905

PMID: 4063071

DOI: 10.1515/bchm3.1985.366.2.699



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