Levels of active caspase-3 in the liver and the spleen. These blots are representative of 3 repeat experiments. (A) Active caspase-3 and (B) procaspase-9 levels in the liver after siRNA treatment. (C) Caspase-3 (left graph) and 8 (right graph) activities (in arbitrary fluorescent units) in the liver and the spleen after CLP and Fas or caspase-8 siRNA treatment. Data are presented as mean ± SE of the mean.