Ryuzaki M
Comp Biochem Physiol B. 1986;84(4):441-5. doi: 10.1016/0305-0491(86)90103-3.
Qualitative and quantitative changes in phosphatidylethanolamine (PE) were analyzed in the eggs, embryos and tadpoles of the Japanese pond frog, Rana nigromaculata, at various stages of development. The weight percentage of PE to total phospholipid and to total lipid was about 15-18% and about 3-4%, respectively, during embryonic life. At all stages from the unfertilized egg to the feeding tadpole, the major fatty acids at the 1-position of PE were palmitic, stearic and oleic acids. At the 2-position, arachidonic, oleic, palmitic, stearic and linoleic acids were present during embryonic life. The most abundant fatty acid at the 2-position was arachidonic acid at the unfertilized egg and hatching embryo stages. However, palmitic acid was the most prevalent 2-fatty acid at the posthatching tadpole and the feeding tadpole stages. Thus, there were marked changes in the positional distribution of the constituent fatty acids in PE during development.
分析了黑斑侧褶蛙在不同发育阶段的卵、胚胎和蝌蚪中磷脂酰乙醇胺（PE）的定性和定量变化。在胚胎期，PE占总磷脂和总脂质的重量百分比分别约为15 - 18%和约3 - 4%。从未受精卵到摄食期蝌蚪的所有阶段，PE 1位的主要脂肪酸为棕榈酸、硬脂酸和油酸。在2位，胚胎期存在花生四烯酸、油酸、棕榈酸、硬脂酸和亚油酸。在未受精卵和孵化胚胎阶段，2位最丰富的脂肪酸是花生四烯酸。然而，在孵化后蝌蚪和摄食期蝌蚪阶段，棕榈酸是最普遍的2位脂肪酸。因此，发育过程中PE中组成脂肪酸的位置分布发生了显著变化。
