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. Author manuscript; available in PMC: 2012 Dec 1.

Published in final edited form as: Electrophoresis. 2011 Nov 24;32(24):3526–3535. doi: 10.1002/elps.201100327

(a) IRMPD (80 scans, 1 s at 10 W) and (b) EDD (80 scans, 1s irradiation, cathode bias – 30 V) spectra of doubly deprotonated 2-AA-labeled LSTb (m/z = 558.69). Cross-ring fragments are highlighted in bold, reducing end fragment ions lacking 2-AA are underlined in the spectra, and electronic noise peaks are indicated by asterisks. All product ions are singly charged. Fragmentation patterns from IRMPD and EDD are summarized in Figure 5c.

(a) IRMPD (80 scans, 1 s at 10 W) and (b) EDD (80 scans, 1s irradiation, cathode bias – 30 V) spectra of doubly deprotonated 2-AA-labeled LSTb (m/z = 558.69). Cross-ring fragments are highlighted in bold, reducing end fragment ions lacking 2-AA are underlined in the spectra, and electronic noise peaks are indicated by asterisks. All product ions are singly charged. Fragmentation patterns from IRMPD and EDD are summarized in Figure 5c.