The mammalian forkhead O class transcription factors (FOXO) regulate diverse cellular processes such as metabolism, cell cycle, and apoptosis. Activity of these transcription factors can be regulated by diverse post-translational modifications including phosphorylation, acetylation, and ubiquitination (1). These modifications can alter nuclear transport, DNA binding, and protein-protein interactions to alter transcriptional activity. The best studied member of the FOXO family is FOXO1.