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ZL rats and ZDF rats, n = 3, respectively. ZL 1-3, stomach; ZL 4-6, duodenum; ZL 7-9, jejunum; ZL 10-12, ileum; ZL 13-15, cecum; ZL 16-18, feces. ZDF 1-3, stomach; ZDF 4-5, duodenum; ZL 6-8, jejunum; ZL 9-11, ileum; ZL 12-14, cecum; ZL 15-17, feces.
