BH3 hydrochloride, a peptide that crosses the blood-brain barrier, induces apoptosis either through direct activation of the pro-apoptotic proteins Bax/Bak or by inhibiting anti-apoptotic Bcl-2 proteins (Bcl-2, Bcl-XL, Bcl-w, Mcl-1, and A-1) through their BH3 domain [1][2].