Composition of Molecular Species and Positional Distribution of Fatty Acid of Phosphatidylglycerol from Ginkgo Leaf
银杏叶片磷脂酰甘油脂肪酸分子种组成及其位置分布

The composition of molecular species and the positional distribution of fatty acids of phosphatidylglycerol (PG) isolated from Ginkgo leaf were examined and analyzed by high-perfor-mance liquid chromatography (HPLC) and enzymic hydrolysis. The fatty acid compositions (sn-1/ sn-2) of the identified major mglecular species were 18:3/16: 1(30,18:3/16:0,18:2/16: 1(3t),18:2/16:0,18:1/16: 1(3t,16:0/16:1 (3t), 18: 1/18: 1,18:1/16:0 and 16:0/16:0. The results showed that C18 fatty acids were principally localized at the sn-1 position, the component 16:1 (3t exclusively occupied the sn-2 position and 16:0 was found at both the sn-1 position and the sn-2 positon. The degree of unsaturation at the sn-1 postion was higher than that at the sn-2 positon.