Platelet Derived Growth Factor BB, Recombinant, Mouse (PDGF-BB, Platelet-derived Growth Factor B Chain, Platelet-derived Growth Factor beta Polypeptide, Platelet-derived Growth Factor Subunit B, PDGF Subunit B, PDGFB, PDGF2, PDGF-2, Proto-oncogene c-Sis, SIS, SSV)