Exons of Leukemia Suppressor Genes: Creative Assembly Required.

Alternative splicing (AS) has many important roles in the pathogenesis of leukemia. Recent papers suggest that one of its key aspects is exclusion of 3'-terminal exons in favor of premature termination using intronic polyadenylation signals. This process generates leukemia suppressor isoforms with truncated C termini and acting in loss-of-function or dominant-negative manners.