1. 1. The lipids of liver were reexamined for polyphosphoinositide, previously reported absent. The presence of a diphosphoinositide (DPI) was revealed by the isolation of inositol diphosphate (IP2) from an acid hydrolysate, and its glyceryl derivative from an alkaline hydrolysate of the concentrated phospholipid fraction. 2. 2. Starting with lipids extracted from liver and pancreas by azeotropic ...... hiện toàn bộ