Guo-Liang “Chewie” Chew received the Mahan Postdoctoral Fellowship from the Computational Biology Program at Fred Hutch. Chewie proposed to study the biology of retroelements, repetitive DNA sequences that constitute a large fraction of the human genome, and their interactions with RNA surveillance pathways such as nonsense-mediated decay. Chewie proposed to determine differences in retroelement regulation and expression in normal and disease states to gain insight into the physiological roles played by these poorly understood genomic elements.