Respiratory Pigment in Fishes:
Hemoglobin
Tetrameric hemoglobin has two
α and two β chain
O
2
bind in reversible and cooperative fashion
to four heme group while
H+ and CO
2
bind to specific amino acid residues in the globin chains
But in fishes, due to acetylation of
α amino group only β chain available
in bind to CO
2