the concentration of r-nt was highest in the jejuno-ileal section of the intestine ( approximately 50 pmol/g ) but it was also detected in the esophogus , stomach , duodenum , and large intestine ( approximately 1 to 8 pmol/g ) than the remaining muscle layer ( approximately 40 pmol/g ) .
C0021853
intestine
C0021851
large intestine