1How can you predict whether a BCL protein is pro-apoptotic? a.Steady state localization to the mitochondria b.Presence of an exposed BH3 domain c.Presence of a BH4 domain d. Can heterodimerize with other BCL proteins e Presence of a BH3 domain 2. how does BCL-XL block apoptosis? a.Binds to the proton transition pore b Maintains electron transport through oxidative phosphorylation c. Blocks the release of cytochrome C d.Binds to BCL-2 e Blocks the loss of membrane potential.