Comparative Lipid Composition of Three Porcine Muscles

Abstract

Porcine diaphragm muscle contained higher levels total lipid, lipid phosphorus and cholesterol and had a lower cholesterol/lipid phosphorus ratio than the l. dorsi and psoas major muscles. The I. dorsi and psoas major did not differ for any of the lipid components analyzed. The cholesterol ester content was similar in all three muscles and in some samples was not detected. Analysis of the fatty acid composition in the complete lipid extract indicates that the l. dorsi had significantly more C14 and C18—1 fatty acids and significantly less C18—2 fatty acid than either the diaphragm or psoas major. The diaphragm had significantly more C18 fatty acid than the l. dorsi. No significant difference was found between the diaphragm and psoas major for any of the complete lipid extract fatty acids. All differences in the neutral lipid fatty acids were smaller in magnitude than for the same fatty acids in the complete lipid extract. The diaphragm had significantly less C14 fatty acid in the neutral lipid fraction than either of the other two muscles. Fatty acids C18 and C18-2 in the neutral lipid fraction were significantly higher in the diaphragm and psoas major, respectively, than in the l.dorsi. When complete and neutral fraction fatty acid composition was compared within muscles, the complete lipid extract had a significantly larger quantity of C15 and C18—2 fatty acids in all three muscles. The neutral lipid fraction had significantly more C18—1 fatty acid. Copyright © 1967. American Society of Animal Science . Copyright 1967 by American Society of Animal Science