Carnivora: The Primary Structure of the Giant Otter (Pteronura brasiliensis,Mustelidae) Hemoglobin

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Abstract
The hemoglobin of the Giant Otter (Pteronura, brasiliensis Carnivora) contains only one component. The complete primary structures of the .alpha.- and .beta.-chains are presented. The globin chains were separated by high-performance liquid chromatography and the sequences determined by automatic liquid- and gas-phase Edman degradation of the chains and their tryptic peptides. The .alpha.-chains show 18 and the .beta.-chains 12 exchanges compared with human .alpha.- and .beta.-chains, respectively. In the .alpha.-chains, two substitutions involve .alpha.1/.beta.1-contacts and one a heme-contact. In the .beta.-chains one .alpha.1/.beta.1-,one .alpha.1/.beta.2- and one heme-contact are exchanged. The .alpha.-and .beta.-chains of the Giant Otter are compared those of the Common Otter and other Carnivora hemoglobins.

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