The amino acid sequence of the α‐ and β‐chains of the two hemoglobins of the Antarctic fish Notothenia coriiceps neglecta

Abstract The blood of the Antarctic fish Notothenia coriiceps neglecta contains two hemoglobins, Hb 1 and Hb 2, which have a β-chain in common. We have elucidated the primary structure of the β-chain (146 residues) and of the α-chains (142 residues) of the two hemoglobins. The two α-chains differ from each other by 51 residues; in comparison with globin sequences of temperate fishes, the α-chain of Hb 1 is more similar to that of bluefin tuna than to the α-chain of Hb 2 of the same species.