porphine molecular structure, 3d model molecule, porphin, structural chemical formula view from a microscope

porphine porphin tetrapyrroles molecule microscope transparent molecular structure chemical formula model c20h14n4 bubble air glass atom oxygen carbon nitrogen hydrogen chemistry hemoglobin porphyrin aromatic cytochrome erythrocyte heme myoglobin illustration macrocyclic atomic chlorophyll structural cofactor hematin protoheme tetrapyrrolic macrocycles ring biochemistry medicine science macrocycle pyrrole dioxide drug medical view from microscope