Western blot analysis of expression of MLL fusion genes
and deletion mutants in U937T cells. Cells were induced for 48 hr in
tetracycline-free medium. Cell extracts were prepared, run on 6%
(MLLΔT, MLL-AF9; A) or 12% (MLL2AT, MLL3AT;
B) polyacrylamide/Tris–glycine gels, and blotted to
nitrocellulose, and proteins were detected with M2 anti-FLAG monoclonal
antibody.