H-Lys-Arg-Asn-Lys-Asn-Asn-OH is the minimal active structure of oxyntomodulin.

@article{CarlesBonnet1996HLysArgAsnLysAsnAsnOHIT,
  title={H-Lys-Arg-Asn-Lys-Asn-Asn-OH is the minimal active structure of oxyntomodulin.},
  author={Chantal Carles-Bonnet and Jean Mart{\'i}nez and Claire Jarrousse and Andr{\'e} Aumelas and Huguette Niel and Dominique Bataille},
  journal={Peptides},
  year={1996},
  volume={17 3},
  pages={557-61}
}
Oxyntomodulin inhibits gastric acid secretion via its C-terminal octapeptide. Its minimal active structure was delineated by testing, on histamine-stimulated gastric acid secretion in the conscious rat, the inhibitory effect of octapeptide analogues, shortened either or both on their N- or C- terminus. The octapeptide may be simplified by deleting the two C-terminal amino acids while keeping its efficacy and the slope of the dose-response curve. Suppressing the first N-terminal amino acid… CONTINUE READING