Abstract
Liver phosphatidylinositol was hydrolyzed to give glycerylphosphorylinositol, alkaline hydrolysis of which gives a mixture of inositol monophosphate (30-40%) and glycerophosphate. Hydrolysis of synthetic glycerol 1-(inositol-2-phosphate) gives a similar mixture. Steric effects in the hydrolysis are discussed and it is concluded that liver phosphatidylinositol has the inositol 1- or 2-phosphate structure.