Heme is a coordination complex consisting of a porphyrin ring surrounding a single ferrous (Fe 2+) or ferric (Fe 3+) ion, able to bond with diatomic oxygen and transport it around the body. Four heme ...

Heme, an iron–protoporphyrin IX complex, is synthesised through an eight-step pathway beginning and ending in the mitochondrial matrix, with several cytosolic intermediates. Ferrochelatase catalyses ...