Phenotype of Trib1- and Evi1-related AMLs. (A, Top) Proliferation of myeloblasts in bone marrow of Hoxa9/Meis1 + pMYs-GFP, Trib1, and Trib1/Hoxa9/Meis1 AMLs (Wright-Giemsa staining). (Bottom) FACS analysis of the same AMLs, showing positivities for myeloid markers Mac-1 and Gr-1. (B, Top) Bone marrow samples of Evi1 MDS mouse and Evi1/Hoxa9/Meis1 AML (Wright-Giemsa staining). Original magnification, 1000×. (Bottom) FACS analysis of the same samples.