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| CYB561D1 | Cytochrome b561 family member D1. (251 aa) | ||||
| CYB561 | Cytochrome b561; Secretory vesicle-specific electron transport protein. (258 aa) | ||||
| CYB561A3 | Cytochrome b ascorbate-dependent protein 3; Ferric-chelate reductase that reduces Fe(3+) to Fe(2+) before its transport from the endosome to the cytoplasm. Probably uses ascorbate as electron donor (By similarity). (263 aa) | ||||
| CYB561D2 | Cytochrome b561 domain-containing protein 2; Two-heme-containing cytochrome that catalyzes ascorbate- dependent trans-membrane ferric-chelate reduction. (222 aa) | ||||
| FRRS1 | Ferric-chelate reductase 1; Ferric-chelate reductases reduce Fe(3+) to Fe(2+) before its transport from the endosome to the cytoplasm; Belongs to the FRRS1 family. (626 aa) | ||||
| CYBRD1 | Cytochrome b reductase 1; Ferric-chelate reductase that reduces Fe(3+) to Fe(2+). Present at the brush border of duodenal enterocytes where it probably reduces dietary Fe(3+) thereby facilitating its transport into the mucosal cells. Uses ascorbate as electron donor. May be involved in extracellular ascorbate recycling in erythrocyte membranes. May also act as a ferrireductase in airway epithelial cells. (286 aa) | ||||