Abstract
1) The lipid contents of various organs of mice were examined. The phospholipid contents were considemably different between them and decreased in the following order: brain, liver, kidney, lung, intestine and muscle. The neutral fat contents decreased in the following order: limbic muscle, kidney, abdominal muscle, brain, intestine, lung, spleen and heart.
2) Generally speaking, fatty acid composition of neutral fat, with exception of brain, showed the similar tendency between them. The content of saturated fatty acids was larger in lung than in any other organ.
3) Organs of mice examined could be classified into the following three groups on the basis of the distribution pattern of fatty acid in phospholipids.
1. heart, limbic muscle, abdominal muscle, liver, kidney and intestine
2. lung and spleen
3. brain
Lung and spleen were divided from the first group by their high palmitic and low linoleic acid contents.
The fatty acid composition of brain was much different from those of the former two groups.
4) The exsistence of a polyunsaturated acid, docosahexaenonic acid was verified in the several organs, especially heart, limbic muscle, kidney and abdominal muscle.
