text_1: MLL-FKBP and MLL-AF9 transformed cells showed persistent expression of Hox a7 and Hox a9 as well as the Hox cofactor Meis 1. 
text_2: Regardless of the mechanism for transcriptional activation, increasing data suggest that Hox a7, Hox a9, and Meis1 are pivotal targets for MLL fusion protein-mediated transformation.