PARP3 is a sensor of nicked nucleosomes and monoribosylates histone H2B(Glu2). - Grundy, GJ; Polo, LM; Zeng, Z; Rulten, SL; Hoch, NC; Paomephan, P; Xu, Y; Sweet, SM; Thorne, AW; Oliver, AW; Matthews, SJ; Pearl, LH; et al. (Nature Communications, 2016)