Predicted to enable beta-2-microglobulin binding activity; co-receptor binding activity; and transferrin receptor binding activity. Involved in several processes, including acute-phase response; liver regeneration; and response to starvation. Located in apical part of cell; plasma membrane; and terminal web. Human ortholog(s) of this gene implicated in several diseases, including acute porphyria (multiple); arthritis (multiple); bone marrow cancer (multiple); hemochromatosis (multiple); and liver disease (multiple). Orthologous to human HFE (homeostatic iron regulator). [provided by Alliance of Genome Resources, Apr 2022]