RT Journal Article SR Electronic T1 Electron immunohistochemical evidence for the human intestinal I cell as the source of CCK. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 403 OP 407 DO 10.1136/gut.19.5.403 VO 19 IS 5 A1 A M Buchan A1 J M Polak A1 E Solcia A1 C Capella A1 D Hudson A1 A G Pearse YR 1978 UL http://gut.bmj.com/content/19/5/403.abstract AB Evidence was obtained by the use of alternate semithin-thin serial secretions for light and electron microsocpy that the I cell is the source of CCK PZ. The antibodies used were raised to a synthetic fragment of the mid part (9-20) of the (1-33) CCK-PZ molecule, and were thus free from any contamination with cross-reacting subpopulations of antibodies that might bind to gastrin.