found: MeSH browser, Aug. 1, 2006(Heme. Scope note: The color-furnishing portion of hemoglobin. It is found free in tissues and as the prosthetic group in many hemeproteins.)
found: Dorland's med. dict.(heme: the nonprotein, insoluble, iron protoporphyrin constituent of hemoglobin, various other respiratory pigments and of many cells, both animal and vegetable. Formerly known as hematin.)