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contentuptodate· Content· item f3_34_3631
©2013 UpToDate ® Print Email Molecular forms of cholecystokinin (CCK) and gastrin Amino acid sequences of CCK-58, -33, and -8, and gastrin-34 and -17, all of which are biologically active. All forms of CCK and gastrin share an identical carboxyl terminal pentapeptide sequence (highlighted in the boxes).