gastrin , secretin , gastric inhibitory polypeptide , enteroglucagon and neurotensin immunoreactivity were almost confined to the endocrine cell-containing mucosal epithelium ( greater than 98 % of the total content ) , only minor amounts of motilin being detected in non-epithelial layers ( 3.6 +/- 0.7 % , mean +/- sem , n = 7 ) .
C0229525
endocrine cell
C0014609
epithelium