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

Abstract

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.