title: Constancy and variability in the primary structure of haemoglobins.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005075:Biological Evolution; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D010455:Peptides; D013045:Species Specificity
chemical_list: D006454:Hemoglobins; D010455:Peptides