MeSH definition : Porphyrins with four methyl, two vinyl, and two propionic acid side chains attached
to the pyrrole rings. Protoporphyrin IX occurs in hemoglobin, myoglobin, and most
of the cytochromes.;
Wikipedia automatic translation : Protoporphyrin;
MeSH annotation : porphyrins;
Wikipedia link : https://en.wikipedia.org/wiki/Protoporphyrin;
Porphyrins with four methyl, two vinyl, and two propionic acid side chains attached
to the pyrrole rings. Protoporphyrin IX occurs in hemoglobin, myoglobin, and most
of the cytochromes.