Cardiolipin (diphosphatidylglycerol) is a phospholipid present in mitochondria. It is formed from phosphatidylglycerol, which in turn is synthesized from CDP-diacylglycerol and glycerol 3-phosphate. Cardiolipin, found in the inner membrane of mitochondria, has a key role in mitochondrial structure and function and is also thought to be involved in programmed cell death (apoptosis). Cephalin: Has choline base which has labile methyl group. Harper's Illustrated Biochemistry 30th edition page no 248
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