Figure 4From: Construction and analysis of a modular model of caspase activation in apoptosisRegression analysis of apoptosis under various conditions. Activation time regression coefficients for sample model cases. The activation time is defined as the time at which the peak caspase-3 concentration over the time course occurs. The regression coefficients are ordered by their parameter indices as shown in Table 5. Induction by FasL ([FasL]0 = 2 nM unless noted) corresponds to receptor-mediated apoptosis, while induction by tBid corresponds to mitochondrial apoptosis ([tBid]0 = 25 nM and [FasL]0 = 0 unless otherwise noted). (a) HeLa cell induced by FasL (r2 = 0.9958). (b) Jurkat T cell induced by FasL (r2 = 0.9903). (c) Jurkat T* cell induced by FasL (r2 = 0.9846). (d) Jurkat T* cell induced by low FasL ([FasL]0 = 0.01 nM; r2 = 0.9569). (e) HeLa cell induced by tBid (r2 = 0.9705). (f) Jurkat T cell induced by tBid (r2 = 0.9879). (g) Jurkat T* cell induced by tBid (r2 = 0.8873). (h) Predicted type II apoptosis cell parameters (k-4 = k-6 = 10-3 s-1, [XIAP]0 = 200 nM, [FasR]0 = 1 nM) induced by FasL (r2 = 0.9264).Back to article page