Anti-BFD antibodies enable researchers to detect and measure the BFD antigen in biological samples. This target is a reported synonym of the CFP gene, which encodes complement factor properdin. This protein is known to function in immune response pathways, among other biological roles. The human version of BFD has a canonical amino acid length of 469 residues and a protein mass of 51.3 kilodaltons. It is reported to be a secreted protein.