. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "pdgfb_human"^^ . "PDGF-2"^^ . "Platelet-derived growth factor beta polypeptide"^^ . "PDGFB"^^ . "Platelet-derived growth factor B chain"^^ . "PDGF2"^^ . "Proto-oncogene c-Sis"^^ . "SIS"^^ . . "Platelet-derived growth factor subunit B"^^ .