N-terminal amino acid sequences of the α and β chains of the two chicken hemoglobin components

Amino acid sequences corresponding approximately to the N-terminal third of the α and β chains of the minor chicken hemoglobin component (P1) have been determined. When each subunit is compared to the corresponding chain belonging to the major chicken hemoglobinic component (P2), a high number of amino acid substitutions can be observed between both chicken α chains while no difference can be noticed between the two β subunits.