Table 5 Mass shifts occurring more frequently on C-terminal ends of proteins

+129 Da

1

165 / 703 (23.47%)

78 / 10189 (0.77%)

2.00×10⁻¹⁴²

2

212 / 886 (23.93%)

49 / 8541 (0.57%)

1.98×10⁻¹⁷⁷

3

82 / 502 (16.33%)

59 / 8478 (0.70%)

4.36×10⁻⁶⁷

+16 Da

1

39 / 205 (19.02%)

14781 / 518680 (2.85%)

7.88×10⁻²¹

2

42 / 245 (17.14%)

10280 / 392408 (2.62%)

7.76×10⁻²²

3

22 / 103 (21.36%)

21080 / 428969 (4.91%)

5.13×10⁻⁰⁹

+130 Da

1

56 / 427 (13.11%)

2 / 366 (0.55%)

1.18×10⁻¹⁴

2

75 / 542 (13.84%)

0 / 549 (0.00%)

1.02×10⁻²⁴

3

18 / 276 (6.52%)

0 / 196 (0.00%)

8.29×10⁻⁰⁵