of the naturally occurring forms of cck , cholecystokinin octapeptide ( cck-8 ) was extensively extracted ( 26 +/- 0.7 % of bolton-hunter-labeled cck-8 , 59 % of unlabeled cck-8 ) in a single pass through the liver , while cck-33 was minimally extracted ( 3.1 +/- 1.2 % of bolton-hunter-labeled cck-33 ) .
C0008328
cck
C0037167
cholecystokinin octapeptide