Exposure of PC12 cells to C2 -ceramide results in dose-dependent apoptosis. Here, we investigate the involvement of death-associated protein (DAP) kinase, initially identi®ed as a positive mediator of the interferon-c-induced apoptosis ofHeLa cells, in theC2-ceramide-inducedapoptosis of PC12 isendogenouslyexpressedinthesecells.