Plasma nucleosome levels from apoptotic or necrotic Jurkat cells. After the administration of apoptotic (camptothecin, A) (etoposide, C) or necrotic (heat, B) (70% ethanol, D) Jurkat cells in varying doses, plasma samples were collected, and nucleosome levels were measured by immunoassay. Results are presented as mean (± SEM) of 3 mice for each dose as indicated. Nucleosome values are expressed as RUs.