PUMA BH3

PUMA BH3 is a p53 upregulated modulator of apoptosis (PUMA) BH3 domain peptide that acts as a direct activator of Bak with a Kd of 26 nM. PUMA proteins bind Bcl-2, localize to the mitochondria, and induce cytochrome C release and apoptosis in response to p53, potentially mediating p53-induced apoptosis.