Which of the following phospholipid serves as a marker of apoptosis: (A) Phosphatidylinosital, (B) Phosphatidyl serine, (C) Phosphatidyl choline, (D) Phosphatidyl ethanolamine
Answer is B. Phosphatidyl serine is normally present on inner mitochondrial membrane, flipping of it to the outer mitochondrial membrane is seen in apoptosis.