ギンザメ類2種の肝臓中のエ-テル脂質の組成について〔英文〕

概要

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The compositions of diacyl glyceryl ethers and neutral plasmalongens of the liver lipids of male and female specimens of two species of deep-sea ratfish Hydrolagus barbouri and Rhinochimaera pacifica were investigated. The livers of the examined ratfish yielded high lipid contents (75.9%-82.9%). Neutral lipids were the perdominant classes, accounting for more than 98% of the total lipid contents. The livers of these fish contained, in addition to 22.8%-31.7% triglycerides, ether-linked lipids of 53.5%-63.4% diacyl glyceryl ethers and 1.0%-6.7% neutral plasmalogens. In both species, the component alkyl glyceryl ethers of diacyl glyceryl ethers were found to consist mostly of monoenes (76.2%-81.1%) and saturates (15.5%-19.6%) of 14-24 carbon atoms for the alkyl moiety. The principal components found were: 18:1 (43.7%-57.5%), 16:1 (6.8%-13.5%), 20:1 (5.7%-8.7%), and 16:0 (5.4%-7.8%). The component aldehydes obtained from alk-l-enyl glyceryl ethers of neutral plasmalogens were mostly composed of monoenes (63.8%-81.8%) and saturates (18.8%-34.0%) of 14-24 carbon atoms. The major constituents were: 20:1 (40.3%-55.2%), 18:1 (5.4%-25-8%), 18:0 (5.7%-18.1%), and 16:0 (5.3%-8.0%). The component fatty acids of diacyl glyceryl ethers and neutral plasmalogens were roughly similar in composition to those of triglycerides. Monoenes having 18:1, 20:1, and 22:1 acids as the predominant components were found.