Tetrapeptide derived inhibitors of complexation of a class II MHC: the peptide backbone is not inviolate.
Jones AB., Acton JJ., Rivetna MN., Cummings RT., Cubbon RM., Nichols EA., Schwartz CD., Wicker LS., Hermes JD.
Major histocompatabilty (MHC) proteins rely heavily on peptide backbone recognition for ligation. Nonetheless, modifications to the polyamide backbone of a tetrapeptide ligand can be made without abrogating binding.