the cck-like activity eluted from sephadex g50 with a kav of 0.69 , after the triacontriapeptide of cholecystokinin ( cck33 ) and before cholecystokinin octapeptide 2500 , may represent the 22 amino acid peptide of cck ( cck22 ) .
C0037167
cholecystokinin octapeptide
C0008328
cck