Abstract
Participation of microsomal CDP-diglycerides in mitochondrial biosynthesis of phosphatidylglycerol was studied by [3H]palmitoyl, [14C]linoleoyl, and [14C]arachidonoyl CDP-diglycerides and [3H]CDP-diglycerides which were bound to microsomal membranes, incubated with unlabelled mitochondrial membranes, and further incubated in the presence of radioactive sn-glycero-3-phosphate under conditions required for mitochondrial phosphatidylglycerol biosynthesis. Ten to 15% of microsomal radioactive CDP-diglycerides was transferred to mitochondrial membranes and incorporated into mitochondrial radioactive lipids identified as phosphatidylglycerol, phosphatidylglycerophosphate, and, when [14C]linoleoyl CDP-diglycerides were used, diphosphatidylglycerol (cardiolipin).
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