NUP98 fusion proteins. (A) Schematic showing structure of the NUP98 protein and position of NUP98 fusion points in human leukemias. Arrows indicate fusion points. In all cases, the amino terminus of NUP98 is fused to the carboxyl terminus of the partner gene. (B) Schematic showing relevant domains of partner proteins and the position of the protein fusion. Domains are indicated in the key. Arrows indicate fusion point.