. 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 3.

Some unmodified peptides yielding the unusual fragment ion ^a

Sequence	‘x’ m/z exp.^b	‘x’ m/z calc.	Δ ppm
VLALPEPSPAAPTLR	822.4538	822.4464	9
DTHDQLSEPSEVR	500.2472	500.2463	2
<QLMHNGHPSEK	373.1753	373.1717	9
TPDSLEPSPLK	454.2625	454.2659	7
<QTPSGTASR	588.2673	588.2736	11

Data were acquired on a QSTAR Pulsar mass spectrometer.

after internal calibration