Anti-FLVCR, C-terminal

Protein function: Isoform 1: Heme transporter that exports cytoplasmic heme. It can also export coproporphyrin and protoporphyrin IX, which are both intermediate products in the heme biosynthetic pathway. Does not export bilirubin. Heme export depends on the presence of HPX and may be required to protect developing erythroid cells from heme toxicity. Heme export also provides protection from heme or ferrous iron toxicities in liver and brain. Causes susceptibility to FeLV-C in vitro. Required during erythtopoiesis to maintain intracellular free heme balance since in proerythroblasts, heme synthesis intensifies and it's accumulation is toxic for cells. [The UniProt Consortium]