. Author manuscript; available in PMC: 2013 Apr 1.

Published in final edited form as: J Am Soc Mass Spectrom. 2011 Aug 5;23(4):602–607. doi: 10.1007/s13361-011-0216-7

Table 2.

Mass accuracy for the ions in Figure 2. Fragments m/z 185 and 282 served as internal standards.

m/z exp.	m/z calc.	dev [ppm]	assignment
185.0921	185.0921	Ref1	y₂-H₃PO₄
213.0909	213.0870	18	y₂
226.0886	226.0822	28	EN/NE-H₂O
244.0947	244.0928	8	EN/NE
259.0963	259.0925	15	EE
265.0605	265.0584	8	PS(phospho)
282.1448	282.1448	Ref2	y₃-H₃PO₄
348.2084	348.2020	18	b₃(2+)
355.1240	355.1248	−2	ENE/NEE-H₂O
380.1256	380.1217	10	y₃
404.7454	404.7440	3	b₄(2+)