The chemical composition of erythrocytes and structure of hemoglobin
Erythrocytes consist of 55 % of water and 45% of dry part. Dry part is 40% of hemoglobin and 5% of other substances (organic and inorganic).
Hemoglobin consists of globin (2 alfa-chains and 2 beta-chains. Each alf-chain contains 141 amino acids; beta chain contains 146 amino acids) and 4 hemes. Heme is 1,3,5,8-tetramethyl;2,4-divinyl; 6,7-dipropionic iron porphyn (should be known by formula):