somatostatin , measured with an antiserum highly specific for somatostatin-14 , was found throughout the wall , mainly in the epithelium ( 39.9 +/- 5.2 % ) and lamina propria ( 29.5 +/- 5.9 % ) , but could be immunostained only in endocrine cells .
C0014609
epithelium
C0229525
endocrine cells