Lipids and other components of human jejunal and ileal mucosa

Jejunal and ileal intestinal segments were obtained from patients undergoing laparotomy, from peroral jejunal biopsies, and from fresh cadavers. The excised mucosa was weighed and assayed for total lipids, neutral and polar lipids. The lipid families were separated and identified, and their individual fatty acid composition determined. In addition, DNA, RNA, collagen and total protein were measured.