The Voltage-Dependent Anion Channel (VDAC or mitochondrial Porin)I is an outer membrane mitochondrial protein. The VDAC protein is thoμght to form the major pores throμgh which adenine nucleotides are transferred throμgh the outer mitochondrial membrane. VDAC has also been implicated in the formation of the mitochondrial permeability transition pore complex in apoptotic cells. This complex, formed by VDAC, ANT, and CypD is thoμght to allow the mitochondria to undergo metabolic uncoupling and irreversible morphologic changes that ultimately destroy the mitochondria during apoptosis.