A) Cultures were incubated with indicated combinations of 50 μM kainic acid (KA), 2 μM Tat-MYC (MYC), and 2 μM Tat-Bcl-xl (Bcl-xL). B) Cultures were incubated with indicated combinations of 100 μM kainic acid (KA), 2 μM Tat-MYC (MYC), and 2 μM Tat-Bcl-xl (Bcl-xL). Neuron death is expressed as a percentage of cells killed relative to KA-free cultures receiving the same vector treatment. *p < 0.05, **p < 0.01, ***p < 0.001, n = 24/group.