197.1 a2-18 (loss of water)

215.1 a2

225.0 b2-18

234.1 y2

243.0 b2

296.1 a3-18

324.0 b3-18

342.0 b3

345.2 y3-18

363.2 y3

408.9 a4-18

437.0 b4-18

455.1 b4

462.1 y4

506.0 b5-18-18 (loss of two waters is plausible, since this is a cleavage at Ser and the N-terminus is Glu)

524.1 b5-18

542.1 b5

575.2 y5

597.2 +2 precursor - two water molecules

606.2 +2 precuror - one water molecule

637.1 b6-18

655.1 b6

688.3 y6

750.1 b7-18

768.2 b7

775.3 y7

849.2 b8-18

867.2 b8

888.3 y8

978.1 b9-18

987.4 y9

996.3 b9

1064.9 b10-18

1083.1 b10