Caspase-3 time course results. Time course of caspase-3 activation ([Casp3*]) in HeLa and Jurkat T cells represented by solid and dashed lines, respectively. The time course for a modification of the Jurkat T cell with k2 = k5 = k12 = 0 based on the formulation of Hua et al. and Okazaki et al. [70, 71] is denoted Jurkat T* and represented by the dotted line.