Cholecystokinin (CCK) has some gastrinlike properties because both CCK and gastrin

Question

Quizplus · Accepted Answer

[II A 2]. The two hormones have five identical amino acids at the $\mathrm{C}$ terminus. Biologic activity of cholecystokinin (CCK) is associated with the seven C-terminal amino acids, and biologic activity of gastrin is associated with the four C-terminal amino acids. Because this CCK heptapeptide contains the five common amino acids, it is logical that CCK should have some gastrin-like properties. G cells secrete gastrin. I cells secrete CCK. The secretin family includes glucagon.

Cholecystokinin (CCK) Has Some Gastrinlike Properties Because Both CCK and Gastrin