---

• n  a complex red organic pigment containing iron and other atoms to which oxygen binds

• Vitally important is the synthesizing of hematin, the red iron core which carries oxygen into the blood.
• He analyzed chlorophyll, the green coloring matter of all growing plants, and showed that chemically it is closely related to hematin, the coloring matter of blood.
• After 17 years of quiet research in his laboratory at Munich, he announced that he had succeeded in synthesizing hematin, the red iron core which carries oxygen into the blood .

• heme
• haem
• haemitin
• protoheme