PPIF (Peptidylprolyl Isomerase F): PPIF, also known as cyclophilin D, is a vital mitochondrial enzyme that regulates the mitochondrial permeability transition pore (MPTP). This pore is crucial in governing cell death processes such as apoptosis and necrosis. PPIF’s activity is fundamental in these pathways, and its inhibition has been explored as a potential therapeutic strategy for conditions like ischemia-reperfusion injury, including heart attack and stroke.