HEMOGLOBIN FROM THE ANTARCTIC FISH NOTOTHENIA-CORIICEPS-NEGLECTA 2. AMINO ACID SEQUENCE OF THE ALPHA CHAIN OF HB 1

The complete amino acid sequence of the .alpha. chain of the main hemoglobin of the Antarctic fish Notothenia coriiceps neglecta (family Nototheniidae) has been determined. It consists of 142 residues; an acetylated seryl residue is at the amino terminal. The molecular mass is 15519 Da. In comparison with .alpha.-chain sequences of non-Antarctic poikilothermic fish hemoglobins, the homolgy appears to be significantly lower than that existing among the latter species. A higher homology has been found with the .alpha.-chain sequence of the non-poikilothermic bluefin tuna.