This is amino acids 86 to 100 fragment of class II-associated invariant chain peptide called CLIP. The major histocompatibility complex class II molecule displays peptide fragments of foreign proteins to trigger a defensive reaction from the immune system. Before insertion of the foreign peptides into the binding groove, a place-holding peptide CLIP is removed. This is accomplished by the molecule DM, which is shown to increase the dissociation rate of a CLIP peptide from class II.

Tetrahydroalstonine is an indole alkaloid extracted from the fruit of Rhazya stricta and is a selective α2-adrenoceptor antagonist. tetrahydroalstonine has shown antipsychotic activity in Rauwolfia tetraphylla.

Ser-Ala-alloresact is a sperm activating peptide (SAP). The peptides released from eggs of marine invertebrates play a central role in fertilization.