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| Description: The protoporphyrin IX is the tetrapyrrole portion of the heme molecule. Heme, which is protoporphyrin IX complexed with Fe(II), is the prosthetic group of hemoglobin and myoglobin. Because of resonance delocalization of the electrons in the porphyrin ring, all N–Fe bonds within the heme are equivalent. Picture Stats: Views: 254 Filesize: 49.88kB Height: 700 Width: 320 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=34115 |