We constructed a generic apoptosis network consisting of 22 signalling proteins including 18 proteins from the biological experiment conducted in [5]. The authors of [5] provided Variable Importance in Projection (VIP) scores for different selected proteins to demonstrate how the selected proteins were useful for predicting apoptosis of different cell lines. For example, proteins with VIP score > 1 were important variables, proteins with VIP score < 0.5 were unimportant variables. Since our goal is to test the goodness of fit of our model with Yaffe's data, we selected proteins that have been measured in the experiment. Also, our signalling network includes molecules based on the prior knowledge from several pathways playing critical roles in inducing cell death, which include DNA damage response and cell death pathways, stress response pathways, etc.