Predicted to enable G protein-coupled receptor activity and serine-type endopeptidase activity. Involved in complement activation; response to lipopolysaccharide; and response to thyroid hormone. Located in extracellular space. Biomarker of polycystic kidney disease and retinal degeneration. Human ortholog(s) of this gene implicated in several diseases, including atypical hemolytic-uremic syndrome; autoimmune disease (multiple); eye disease (multiple); glomerulonephritis (multiple); and sickle cell anemia. Orthologous to human CFB (complement factor B). [provided by Alliance of Genome Resources, Apr 2022]