The acid radical which unites with the protein globin to form hemoglobin.
Nonprotein iron-containing substance in blood.
A chemical derivative of hemoglobin formed by removal of the protein part of the molecule and oxidation of the iron atom from the ferrous to the ferric form.
The nonprotein portion of the hemoglobin molecule wherein the iron is in the ferric (Fe3+) rather than the ferrous (Fe2+) state.
An intravenously administered medication employed to interrupt an episode of acute porphyria. It induces a reduction in the synthesis of heme, thereby impeding the continued buildup of precursor molecules involved in heme production.
The iron-rich compound in hemoglobin that gives red blood cells their color.