Abstract
The lipids used for this experiments were extracted from back (M. longissimus dorsi), round (M. rectus femoris) and shoulder (M. triceps branchii) meat of mutton imported to Japan for the stuff of meat industry. The total lipids were separated into neutral lipid, phospholipid and free fatty acid fractions, and the fatty acid composition of these lipid fractions were determined by gas-liquid chromatography.
Then, the fatty acid distribution in triglyceride was studied by means of pancreatic lipase hydrolysis, and the component triglycerides were calculated according to the 1, 3-random-2-random distribution theory.
Mutton lipids were relatively abundant in stearic acid, and in the triglycerides, saturated fatty acids were found to exist in higher concentrations in 1-and 3-position of glycerol than in 2-position, on the contrary, unsaturated fatty acids were predominantly esterified at 2-position of glycerol.
The triglyceride composition of mutton lipids was roughly estimated as S3 10%, S2U 40%, SU2 39% and U3 11%, and it was considered that the main component triglycerides in mutton were POO, POSt, POP, OOO, PPO, StOSt and etc.
(Abbreviations used in this were as follows; St: stearic, P: palmitic, O: oleic, S: saturated and U: unsaturated acids)
