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Keck Home Page > Protein Chemistry > Table 1

TABLE 1

Summary of In Gel Digests Carried out by the
Yale/Keck Biotechnology Laboratory (6/18/97)

Parameter

<50 pmol

51-100 pmol

101-200 pmol

>200 pmol

Total

           

Number of proteins digested

35

76

69

55

235

Average mass of protein (kD)

87

59

59

55

62

Average amount of protein digested (pmol)

32

75

139

328

147

Median amount of protein digested

29

76

134

282

112

Average gel volume

33

38

66

99

 

Average density of protein band (µg/mm3)

0.100

0.216

0.248

0.498

0.274

Average amount of protease added (µg)

0.966

1.102

1.553

2.377

 

Total number of peptides sequenced

75

156

154

106

491

Average number of peptides sequenced/protein

2.1

2.1

2.2

1.9

2.1

%Peptides sequenced that provided >6 positive residues

80.0

80.1

82.5

84.9

81.9

Average % initial yield

16.2

11.2

11.0

12.0

12.1

Median % initial yield

10.4

7.3

7.0

9.2

7.30

%Peptides that provide no sequence

10.7

8.3

7.1

5.7

7.74

%Peptides that are mixtures

9.3

11.5

9.7

9.4

10.18

Average number residues called/peptide sequenced

11.5

11.1

12.8

13.9

12.3

Overall average background (µg)

-

-

-

-

0.08

           

Overall digest success rate

94.3

97.4

97.1

98.2

96.8

Overall %Known Proteins

89.7

67.2

64.6

81.6

73.2

 

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