Stereospecific analysis of glycerolipids of egg yolk of Japanese quail (Coturnix coturnix japonica) |
| |
Authors: | Kyozo Suyama Susumu Adachi Hiroshi Sugawara Hidemi Honjoh |
| |
Affiliation: | (1) Laboratory of Animal Products Technology, Faculty of Agriculture, Tohoku University, 980 Sendai, Japan |
| |
Abstract: | Phosphatidylcholine, phosphatidylethanolamine and triacylglycerol were isolated from egg yolk of the Japanese quail. Fatty
acid compositions at the two and three positions of glycerol in the glycerolipids were determined by stereospecific analysis
employing phospholipase A2. The distribution of the total number of carbon atoms in the fatty acid moieties of triacylglycerol was also quantitated
by high temperature gas liquid chromatography. The distribution of acyl groups in each of the positions of the phosphatidylcholine,
phosphatidylethanolamine and triacylglycerol was not random, and each position has a characteristic composition. The phosphatidylcholine
and phosphatidylethanolamine had distinctive fatty acid distributions for positionsn-2 of the triacylglycerol had a predominance of unsaturated fatty acids of which 18∶1 (69.9%) was the major component. Positionsn-3 contained 49.3% saturated fatty acids and was more saturated than positionsn-1 by 8.1%. The experimentally determined distribution of the carbon numbers in triacyl glycerol deviated significantly from
the distribution predicted by 1-random-2-random-3-random association of the fatty acids. The data suggest that in Japanese
quail there is marked preferencial synthesis of some triacylglycerols. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|