Runx2 is a common target of transforming growth factor beta1 and bone morphogenetic protein 2, and cooperation between Runx2 and Smad5 induces osteoblast-specific gene expression in the pluripotent mesenchymal precursor cell line C2C12 - Lee, K S; Kim, H J; Li, Q L; Chi, X Z; Ueta, C; Komori, T; Wozney, J M; Kim, E G; Choi, J Y; Ryoo, H M; Bae, S C (Mol Cell Biol, 2000)