Claim: The PDGFA gene, which has two identified splice variants, can exist either as a homodimer or as a heterodimer with the platelet-derived growth factor beta polypeptide
Evidence: Two splice variants have been identified for this gene. This gene product can exist either as a homodimer or as a heterodimer with the platelet-derived growth factor beta polypeptide, where the dimers are connected by disulfide bonds.