Wood R, Peterson S
Department of Biochemistry and Biophysics, Texas A&M University, College Station 77843-2128, USA.
Lipids. 1999 Oct;34(10):1099-106. doi: 10.1007/s11745-999-0461-x.
The fatty acid composition and structure of pawpaw fruit (Asimina triloba) triglycerides were examined and found to contain fatty acids ranging from C6 to C20. Octanoate represented 20% of the fatty acids while other medium-chain fatty acids were present in low amounts. Analysis of the intact triglycerides by high-temperature gas-liquid chromatography gave an unusual three-cycle carbon number distribution. Analysis of triglyceride fractions separated according to degree of unsaturation suggested that one octanoate was paired with diglyceride species containing long-chain fatty acids. Determination of the double-bond positions of monoene fatty acids revealed cis delta9 and cis delta11 hexadecenoate and cis delta9, cis delta11, and cis delta13 octadecenoate isomers were present in significant quantities. Octanoate and positional monoene fatty acid isomers were found only in the fruit lipids and not in the seed lipids. Phenacyl esters of fatty acids were found to be useful derivatives for structure determination using multiple types of analyses.
对番荔枝（Asimina triloba）甘油三酯的脂肪酸组成和结构进行了检测，发现其脂肪酸范围为C6至C20。辛酸占脂肪酸的20%，而其他中链脂肪酸含量较低。通过高温气液色谱法对完整甘油三酯进行分析，得到了异常的三个循环碳数分布。根据不饱和度分离甘油三酯馏分的分析表明，一个辛酸与含有长链脂肪酸的甘油二酯种类配对。单烯脂肪酸双键位置的测定表明，大量存在顺式δ9和顺式δ11十六碳烯酸以及顺式δ9、顺式δ11和顺式δ13十八碳烯酸异构体。辛酸和位置单烯脂肪酸异构体仅在果实脂质中发现，而不在种子脂质中发现。发现脂肪酸苯甲酰酯是用于多种类型分析的结构测定的有用衍生物。
