Melanocortin Research Peptides
Melanocortin peptides derive from the alpha-MSH sequence, and the useful structural distinction within the class is linear against cyclic. Cyclisation through a lactam bridge changes the molecule's conformation and its mass, both of which show on an analytical report, so a mass spectrum is the quickest way to confirm which one a vial holds.
Sequence notation varies across suppliers for these more than for most classes. Comparing the molecular formula on the certificate against a registry entry is more reliable than comparing trade names.
Related classes: Single-Chain Research Peptides, Bioregulator and Neuropeptides.
Certificates of analysis for every lot on this site are listed in the certificate of analysis library.