CeruloplasminĀ (orĀ caeruloplasmin) is aĀ ferroxidaseĀ enzymeĀ that in humans is encoded by theĀ CPĀ gene. Ceruloplasmin is the majorĀ copper-carrying protein in the blood, and in addition plays a role inĀ iron metabolism. It was first described in 1948. Another protein,Ā hephaestin, is noted for it

Indoleamine-pyrrole 2,3-dioxygenase (IDO or INDO EC 1.13.11.52) is a heme-containing enzyme physiologically expressed in a number of tissues and cells, such as the small intestine, lungs, female genital tract or placenta. In humans is