heme o chemical formula. part of hemoglobin. molecular structure. organic compound. . stock image.

molecule hemoglobin chemistry model vector 2d medical oxygen porphyrin carbon background blood heme component molecular formula dioxide structure chemical erythrocyte myoglobin transport protein nitrogen bond oxide pill cell circulation organic substance muscle compound respiratory lab dope nature peptide breathing biology cytochrome metabolism medicine complex enzyme metalloprotein aromatic protoheme biochemistry hem