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Table 1 Number of PSMs obtained by Strategy1 according to raw SPC

From: Evaluation of open search methods based on theoretical mass spectra comparison

Min raw SPC

\(\Delta m\) = 0

\(\Delta m < { 0}\)

\(\Delta m > { 0}\)

Total

#target

#decoy

#target

#decoy

#target

#decoy

#target

#decoy

FDR(%)

7

71,852

87,705

88,895

39,432

107,842

59,678

268,589

186,815

41.02

8

71,852

87,705

55,874

12,352

61,225

19,550

188,951

119,607

38.76

9

32,972

32,740

41,378

3874

40,085

4822

114,435

41,436

26.58

10

32,970

32,739

31,973

868

30,245

1026

95,188

34,633

26.68

11

10,918

11,209

26,095

310

24,547

305

61,560

11,824

16.11

12

10,918

11,208

21,553

112

20,313

94

52,784

11,414

17.78

13

2571

1180

17,893

46

16,939

34

37,403

1260

3.26

14

2571

1180

14,955

22

14,243

17

31,769

1219

3.7

15

1137

380

12,352

9

11,818

9

25,307

398

1.55

16

1137

380

10,239

6

9801

5

21,177

391

1.81

17

672

61

8403

5

8085

4

17,160

70

0.41

18

672

61

6907

4

6662

3

14,241

68

0.48

19

495

49

5590

2

5413

1

11,498

52

0.45

20

495

49

4557

1

4415

1

9467

51

0.54

  1. The best PSMs provided by SpecOMS are separated into three groups based on \(\Delta m\), and subdivided in each group by the origin of the hit (target or decoy database). An FDR < 1% is reached whenever raw SPC is greater than or equal to 17 (row in bold)