Ac-DArg-c[Cys-Glu-His-DPhe-Arg-Trp-Cys]-NH 2 is a cyclic octapeptide with MC4R agonism. Ac-DArg-c[Cys-Glu-His-DPhe-Arg-Trp-Cys]-NH 2 significantly increases heart rate and blood pressure.

Amylin (1-13) (human) is a fragment and a residues within amyloid cores of Amylin (human IAPP). Amylin is a glucose-regulating hormone, deposits as amyloid fibrils in condition of type II diabetes (T2D). Amylin (1-13) (human) has no effect on firbl formation, as it cannot form fibrils by itself.

G4 peptide (SIIGFEKL) is a variant of the agonist ovalbumin (OVA) peptide (257-264), SIINFEKL. OVA Peptide is a class I (Kb)-restricted peptide epitope of ovalbumin presented by the class I MHC (major histocompatibility complex) molecule, H-2Kb (class I genes of the mouse MHC).