porphine or porphyrin, member of porphyrins molecule. it is class of macrocyclic aromatic compounds, as heme cofactor of

porphyrin porphine heme drawing cofactor hemoglobin erythrocyte hematin cytochromes myoglobin macrocyclic aromatic chlorophyll protoheme tetrapyrrolic macrocycles flat icon hydrogen carbon oxygen organic chemistry structural formula atomic molecule structure chemical atom molecular vector member porphyrins molecule class compounds cytochromes skeletal formula