 Electron capture dissociation

Electron capture dissociation fragments multiply charged positive ions after they capture low-energy electrons. In peptide analysis, it can produce backbone cleavages while retaining some modifications that are readily lost by other fragmentation pathways.

Its behavior depends on charge state, structure, and competing relaxation processes. It is a gas-phase ion method in mass spectrometry, distinct from capturing an electron in a neutral solution-phase redox reaction.