Table 8. Correlation of ion detection for phosphorylase b Lys-C digests and SSRCalc Hydrophobicity using ATHAP or CHCA.a) [Reproduced from ref. 33 with Copyright permission of American Chemical Society.].
| Phosphorylase b Lys-C digests | Detection (+/−) | |||
|---|---|---|---|---|
| No. | SSRCalc Hydrophobicity | m/z (Ave.) | ATHAP | CHCA |
| 1 | 55.9 | 3602.2 | ++ | − |
| 2 | 53.9 | 3823.5 | ++ | − |
| 3 | 53.1 | 3890.3 | ++ | − |
| 4 | 51.0 | 3823.5 | ++ | − |
| 5 | 50.7 | 2198.6 | ++ | + |
| 6b) | 45.8 | 2155.6 | ++ | + |
| 7b) | 45.1 | 2742.0 | + | + |
| 8b) | 42.8 | 2969.5 | + | − |
| 9 | 38.9 | 3504.9 | ++ | − |
| 10 | 35.1 | 1855.1 | ++ | ++ |
| 11 | 33.9 | 1657.0 | + | + |
| 12 | 33.6 | 2130.5 | ++ | − |
| 13 | 33.4 | 2629.0 | ++ | ++ |
| 14 | 31.4 | 1610.9 | ++ | ++ |
| 15 | 31.4 | 1814.1 | ++ | ++ |
| 16 | 31.2 | 1526.8 | ++ | ++ |
| 17b) | 30.9 | 2043.3 | ++ | ++ |
| 18 | 30.4 | 1942.3 | ++ | ++ |
| 19 | 29.9 | 2449.7 | − | + |
| 20 | 28.4 | 1304.7 | ++ | ++ |
| 21 | 25.8 | 1263.4 | − | ++ |
| 22 | 24.7 | 1178.3 | − | ++ |
| 23 | 24.5 | 1290.5 | + | ++ |
| 24b) | 18.9 | 1254.5 | + | ++ |
| 25c) | 9.3 | 1102.2 | − | ++ |
a) Ion detection for 1 pmol phosphorylase b Lys-C in-gel digests using ATHAP or CHCA in positive-ion mode. “++” indicates that the ions were detected with S/N≥5, “+” indicates that the ions were detected with S/N=2 to 5, and “−” indicates that no ions were detected. b) These peptides are carbamidomethylated and are not reflected in the SSRCalc Hydrophobicity. c) This peptide is acetylated, which is not reflected in the SSRCalc Hydrophobicity.