These B5R ELISA kits are immunodetection tools for measuring the levels of B5R in biological samples. B5R is an alias of the human CYB5R3 gene, which encodes the protein, cytochrome b5 reductase 3. Notably, B5R is known to play a role in cholesterol metabolism and homeostasis, among other functions. The CYB5R3 protein is 301 amino acid residues in length and 34.2 kilodaltons in mass. However, as many as 3 protein isoforms have been identified. It is localized to the mitochondria, ER, and cytoplasm of the cell. Other names for this target antigen include . Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.