Collision-induced dissociation products of the protonated dipeptide carnosine: structural elucidation, fragmentation pathways and potential energy surface analysis

CID experiments on protonated carnosine, [carnosine + H]+, employing several collision energies were shown to yield eleven different fragment ions, with the production of [carnosine–H2O + H]+ and [carnosine–NH3 + H]+ being the lowest energy processes.