Isolation and Separation of Inositol 1-Phosphate, Cyclic Inositol 1,2-Phosphate, and Glycerylphosphoinositol from Tissue Culture Cells Labeled with [3H]Inositol

Water-soluble phosphorylated inositol derivatives have been separated from each other and from inositol by ion exchange and by thin-layer chromatography. The method, in combination with radioactive labeling, is sensitive enough to be applied to single tissue culture dishes corresponding to 10(6) - 10(7) cells. With this technique glycerylphosphoinositol, inositol 1-phosphate, cyclic inositol 1,2-phosphate, and at least three other inositol labeled compounds can be detected in human, monkey, hamster, mouse, and Japanese quail fibroblasts. During a 24-h incubation with [3H]inositol the extent of labeling of these compounds differed according to the cell type.