TADs are 3D structural units of higher-order chromosome organization in Drosophila.
Szabo Q, Jost D, Chang JM, Cattoni DI, Papadopoulos GL, Bonev B, Sexton T, Gurgo J, Jacquier C, Nollmann M, et al. Sci Adv. 2018 Feb; 4(2):eaar8082. Epub 2018 Feb 28.