GtoPdb Ligand ID: 6666

Peptide Sequence
Chemical Modification
The native sequence of CCK 26-33 is Asp-Tyr-Met-Gly-Trp-Met-Asp-Phe-Asp. C terminal tyrosine at position 1 is the D isomer, Tyr4 is sulphated (OSO3H shown as Tys), and the N terminal is amidated. Both methionines are replaced with norleucine (Nle). Iodinated on the tyrosine at position 1.