| 1322199 | CYB561 | cytochrome b561 | Predicted to enable transmembrane monodehydroascorbate reductase activity. Predicted to be involved in ascorbate homeostasis. Predicted to be located in chromaffin granule membrane. Predicted to be active in lysosomal membrane. [provided by Alliance of Genome Resources, Jul 2025] | 17 | 63432304 | 63446639 | Human | 130 | symbol , old_gene_name , COSMIC , Human Proteome Map , old_gene_symbol | gene, protein-coding, VALIDATED [RefSeq] |
| 1350964 | CYB561A3 | cytochrome b561 family member A3 | Predicted to enable transmembrane ascorbate ferrireductase activity. Predicted to be involved in intracellular iron ion homeostasis. Located in nucleolus. [provided by Alliance of Genome Resources, Jul 2025] | 11 | 61348745 | 61362283 | Human | 83 | symbol , old_gene_name , COSMIC , Human Proteome Map | gene, protein-coding, VALIDATED [RefSeq] |
| 1321956 | CYB561D1 | cytochrome b561 family member D1 | Predicted to enable metal ion binding activity; transmembrane ascorbate ferrireductase activity; and transmembrane monodehydroascorbate reductase activity. Predicted to be involved in transmembrane transport. Predicted to be located in membrane. [provided by Alliance of Genome Resources, Jul 2025] | 1 | 109494094 | 109500435 | Human | 62 | symbol , old_gene_name , COSMIC , Human Proteome Map | gene, protein-coding, VALIDATED [RefSeq] |
| 1353992 | CYB561D2 | cytochrome b561 family member D2 | | 3 | 50365363 | 50368197 | Human | | symbol , old_gene_name , COSMIC , Human Proteome Map | gene, ncrna, VALIDATED [RefSeq] |
| 155782982 | CYB561D2 | cytochrome b561 family member D2 | Enables heme binding activity and transmembrane monodehydroascorbate reductase activity. Involved in ascorbate homeostasis. Predicted to be located in vesicle. Predicted to be active in endoplasmic reticulum. [provided by Alliance of Genome Resources, Jul 2025] | 3 | 50350862 | 50354069 | Human | 84 | symbol , old_gene_name , COSMIC , Human Proteome Map | gene, protein-coding, VALIDATED [RefSeq] |
| 1313951 | CYBRD1 | cytochrome b reductase 1 | This gene is a member of the cytochrome b(561) family that encodes an iron-regulated protein. It highly expressed in the duodenal brush border membrane. It has ferric reductase activity and is believed to play a physiological role in dietary iron absorption. [provided by RefSeq, Jul 2008] | 2 | 171522233 | 171558129 | Human | 144 | old_gene_symbol | gene, protein-coding, VALIDATED [RefSeq] |
| 155782919 | LOC127898564 | CYB561D2-LOC101928965 | | 3 | 50350862 | 50368197 | Human | | name | gene, ncrna, VALIDATED [RefSeq] |
| 1604148 | FRRS1 | ferric chelate reductase 1 | Members of the cytochrome b561 (CYB561; MIM 600019) family, including FRRS1, reduce ferric to ferrous iron before its transport from the endosome to the cytoplasm (Vargas et al., 2003 [PubMed 14499595]).[supplied by OMIM, Mar 2008] | 1 | 99703970 | 99766635 | Human | 63 | description | gene, protein-coding, VALIDATED [RefSeq] |