The molecule is a cyclic tetrapyrrole anion obtained by deprotonation of the carboxy groups of siroheme; major species at pH 7.3. It has a role as a Saccharomyces cerevisiae metabolite and a cofactor. It is a heme and a cyclic tetrapyrrole anion. It is a conjugate base of a siroheme.
iron;3-[(2S,3S,17S,18S)-8,12,17-tris(2-carboxylatoethyl)-3,7,13,18-tetrakis(carboxylatomethyl)-3,18-dimethyl-2,17-dihydroporphyrin-21,23-diid-2-yl]propanoate