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Table 2 Sequencing ions for the insulin peptide FVNQHLCGSHLVEALYLVCGER.

From: Stable isotope shifted matrices enable the use of low mass ion precursor scanning for targeted metabolite identification

b ions

y ions

148.1

2601.3

247.1

2454.2

361.2

2355.1

489.2

2241.1

626.3

2113.1

739.4

1976.0

899.4

1862.8

956.4

1702.9

1043.5

1645.8

1180.5

1558.8

1293.6

1421.7

1392.7

1308.7

1521.7

1209.6

1592.8

1080.6

1705.8

1009.5

1868.9

896.4

1981.1

733.4

2081.1

620.3

2241.1

521.2

2298.1

361.2

2427.2

304.2

2583.3

175.1