How it works
This class holds the site’s most heavily modified molecules. Acylation recurs: Tesamorelin carries a hexenoyl group, and Cagrilintide an eicosanedioyl-γ-glutamate — long fatty-acid additions recorded as compositional facts on the compound pages.
Disulfide bridging appears in Cagrilintide and AOD-9604, and C-terminal amidation is common across the GHRH analogs. These modifications matter for characterization because each one shifts the molecular formula and mass in a defined, checkable way.
The class also stretches its own membership: alongside the peptides sit small-molecule metabolic cofactors — NAD+, glutathione, and 5-Amino-1MQ — which are not peptides at all. Their inclusion is contextual, and their identifiers were hand-built and independently reconciled precisely because a small molecule can share a mass with a different structure.
Because the grouping is contextual and chemically broad, each member is best read through its own characterization record rather than the class label.
Why it matters
The wide chemical range makes this class a useful reminder that analytical methods are tuned to the molecule, not the label: a fatty-acid-acylated peptide and a small-molecule cofactor do not behave the same under one HPLC gradient or ionize the same in ESI-MS.
Grouping by context lets a researcher compare heavily modified peptides side by side and see the modifications — acylation, disulfide, amidation — that distinguish them, patterns invisible one compound at a time.
Classifying by context also keeps the framing honest: the name marks a research area, not an effect. Each compound page states that no representation is made as to any biological effect.
Analytical methods are tuned to the molecule, not the label.
At Lineará
The Secretagogue & Regulatory class page lists every characterized member and links to its compound page, where identity (ESI-MS) and purity (RP-HPLC) are reported per lot.
Because the class contains the site’s most modified molecules and its only non-peptide small molecules, it is where careful identifier work matters most — every formula and mass is reconciled against an independent computation before it is published.