Claim: The PDGFA gene, which has two identified splice variants, can exist either as a homodimer (a macromolecular complex formed by two protein monomers, or single proteins, which are usually non-covalently bound) 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. In biochemistry, a protein dimer is a macromolecular complex formed by two protein monomers, or single proteins, which are usually non-covalently bound. A protein homodimer is formed by two identical proteins.