Despite a substantial increase in protein levels, the C/EBPα target genes Mpo [29], Ltf [30], and Lyz2 [31] remained undetectable in sorted tumor cells from Trib2+/+ and Trib2-/- mice, and expression of the myeloid marker Itgam did not change (data not shown). The gene discussed is CEBPA; the disease is neoplasm.