Table 1.

ETD and ET/CID Fragmentation Summary for Various Triply and Doubly Charged Peptides^a

Peptide Name	[M+3H]3+ with SO2–•	[M+2H]2+ with SO2–•	CID of +1 ion after rxn. of [M+2H]2+ with SO2–•	CID of +1 ion after rxn. of [M+3H]3+ with SO2–•
RKRARKE		No fragmentation observed
Guanidinated-KGAILKGAILR
KGAILKGAILR
Angiotensin
Reduced Somatostatin		No fragmentation observed
Neurotensin
Lys0-Bradykinin

^aOnly c- and z-type fragments are indicated. K represents homoarginine.