Please note: this product can only be supplied to registered research and development facilities, and may be used for in vitro research use only, not for administration to humans or animals.

BH3 domain fragment of PUMA.

PUMA BH3 is a sequence derived from the BH3 domain of the BH3-only protein PUMA (p53 up-regulated modulator of apoptosis]. PUMA, also known as Bcl-2-binding component 3 (BBC3), is a pro-apoptotic protein and member of the Bcl-2 ?protein family. Bcl-2 family proteins regulate the mitochondrial apoptosis pathway by controlling mitochondrial outer membrane permeabilization. The BCL2 protein family is divided into three subfamilies: antiapoptotic BCL2 family proteins, including BCL2, BCLxL, and MCL1; proapoptotic multi-domain BCL2 family proteins, including BAK, BAX, and BOK, and proapoptotic BH3-only proteins, including BIM, PUMA, BID, BAD, NOXA, BMF, HRK, and BIK. PUMA acts as a key mediator of cytosolic proapoptotic p53 function by freeing cytosolic p53 from inactive complexes with BCL-xL.