| Amino acid in position 2 | Observed masses, Da (Calculated average mass Da, relative intensity) | |||
| The Z formc | The Ac-Z formd | The Met-Z forme | The Ac-Met-Z formf | |
| Gly | 7718.92 (7718.39, 100%) | 7761.48 (7760.42, 22%) |
|
|
| Ala | 7732.90 (7732.41, 100%) | 7775.29 (7774.45, 26%) |
|
|
| Pro | 7758.93 (7758.45, 100%) | 7801.92 (7800.49, 16%) |
|
|
| Ser | 7748.95 (7748.41, 100%) | 7791.09 (7790.45, 79%) |
|
|
| Thr | 7762.98 (7762.44, 100%) | 7805.25 (7804.48, 45%) | 7894.07 (7893.64, 6%) |
|
| Cys | 7791.03 (7790.52, 100%)g 7835.35 (7834.53, 83%)h |
|
|
|
| Val | 7760.98 (7760.47, 35%) | 7803.05 (7802.50, 100%) | 7892.15 (7891.66, 61%) | 7934.76 (7933.70, 8%) |
| Leua |
|
| 7890.27 (7889.65, 100%) | 7932.47 (7931.68, 13%) |
| Ile |
|
| 7906.10 (7905.69, 100%) | 7948.73 (7947.73, 9%) |
| Metb |
|
| 7912.15 (7911.67, 100%) | 7954.65 (7953.71, 16%) |
| Asn |
|
| 7906.19 (7906.63, 100%) | 7948.39 (7748.67, 10%) |
| Asp |
|
| 7908.17 (7907.62, 100%) | 7950.23 (7949.66, 34%) |
| Gln |
|
| 7921.29 (7920.66, 100%) | 7962.91 (7962.70, 16%) |
| Glu |
|
| 7922.16 (7921.65, 100%) | 7964.36 (7963.68, 16%) |
| His |
|
| 7930.17 (7929.67, 100%) | 7973.07 (7971.71, 21%) |
| Lys |
|
| 7921.25 (7920.71, 100%) | 7963.85 (7962.74, 19%) |
| Arg |
|
| 7949.21 (7948.72, 100%) | 7991.84 (7990.76, 27%) |
| Phe |
|
| 7940.20 (7939.71, 100%) | 7982.83 (7981.74, 11%) |
| Tyr |
|
| 7956.36 (7955.71, 100%) | 7999.10 (7997.74, 18%) |
| Trp |
|
| 7979.23 (7978.74, 100%) | 8021.86 (8020.78, 11%) |