Apolipoprotein E is a pancreatic extracellular factor that maintains mature β-cell gene expression. - Mahmoud, Ahmed I.; Galdos, Francisco X.; Dinan, Katherine A.; Jedrychowski, Mark P.; Davis, Jeffrey C.; Vujic, Ana; Rachmin, Inbal; Shigley, Christian; Pancoast, James R.; Lee, Samuel; Hollister-Lock, Jennifer; MacGillivray, Catherine M.; et al. (PLoS ONE, 2018)