MTA1 and neoplasm: Moreover, the MTA1-overexpressing subclones displayed enhanced tumor initiation ability in the nude mice (Supplementary Table 2, Fig. 7j); as low as 1 × 105 MTA1-overexpressing cells could initiate tumors, while the controls failed, indicating that MTA1 promotes oncogenesis in vivo (Supplementary Table 2, Fig. 7j).