Lipids in the Harder's gland of certain rodents. II: Phospholipids.

The phospholipid components of Harder's glands of rats and mice were investigated. The content of phosphatidylcholine and of sphyngomyelin is notably less in the rat than in the mouse difference among the other components, being negligible. In the male rat the total phospholipid content is larger than in the female, while in mice the opposite is true. The presence of a large red fluorescent spot, which is not phospholipid, has been shown.