Abstract
Normal tissues, such as rat liver, lung, heart muscle, and small intestine, were found to contain considerable amounts of choline plasmalogen. In rat primary hepatoma, ascites hepatoma and fibrosarcoma also, choline plasmalogen is contained in appreciable amounts. However, it was found that the iodine number of this lipid was always very low in the case of these tumor tissues as compared with that of the lipid isolated from the homologous normal tissue, indicating that the lipid is undergoing a profound change in the degree of unsaturation and is no longer capable of showing TBA-reaction.
