Abstract
The concentration and composition of phospholipids and mitotic activity in regenerating rat liver were studied. (1) The total amount of liver phospholipid increased approximately linearly during 48h after operation but without change in the relative concentrations of individual phospholipids. (2) The appearance of mitoses 30h after operation was accompanied by an increased incorporation of (32)P into the liver phospholipids. (3) The regenerating livers incorporated a higher percentage of the label into the phosphatidylserine+phosphatidylinositol fraction than those of control rats. The percentage of the label incorporated into phosphatidylethanolamine in these livers increased but decreased in the phosphatidylcholine.
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