Table 1. Examples of detected peptides identified by fragmentation spectra.
The post-translational modifications are described and the modified position is in bold in the peptide.
| Virus | Position | Peptide | Modification | Experimental mass, Da | Calculated mass, Da | Mass error, ppm | Mascot score |
|---|---|---|---|---|---|---|---|
| FCV | 9–13 | IGTYR | phos | 688.2952 | 688.2945 | 1.05 | 20 |
| FCV | 9–13 | IGTYR | 608.329 | 608.3282 | 1.39 | 32 | |
| FCV | 16–28 | GVALTDDEYDEWR | GDP | 1,992.6959 | 1,992.6928 | 1.54 | 61 |
| FCV | 16–28 | GVALTDDEYDEWR | GDP, ox | 2,008.6909 | 2,008.6877 | 1.56 | 52 |
| FCV | 16–28 | GVALTDDEYDEWR | GDP, eth | 2,020.7274 | 2,020.7241 | 1.62 | 50 |
| FCV | 16–28 | GVALTDDEYDEWREHNASR | GDP | 2,687.0071 | 2,687.0075 | −0.16 | 10 |
| FCV | 35–47 | KLDLSVEDFLMLR | ox | 1,593.8448 | 1,593.8436 | 0.77 | 86 |
| FCV | 36–47 | LDLSVEDFLMLR | ox | 1,465.7502 | 1,465.7487 | 1.09 | 68 |
| FCV | 50–61 | AALGADDNDAVK | eth | 1,186.5837 | 1,186.583 | 0.62 | 76 |
| FCV | 50–61 | AALGADDNDAVK | 1,158.5542 | 1,158.5517 | 2.23 | 63 | |
| FCV | 64–69 | SWWNSR | ox | 850.3722 | 850.3722 | 0.066 | 29 |
| FCV | 64–69 | SWWNSR | ox, ox | 866.3674 | 866.3671 | 0.39 | 16 |
| FCV | 64–69 | SWWNSR | 834.3776 | 834.3773 | 0.45 | 15 | |
| FCV | 72–84 | MANDYEDVTVIGK | ox | 1,469.672 | 1,469.6708 | 0.84 | 96 |
| FCV | 72–84 | MANDYEDVTVIGK | ox, phos | 1,549.6372 | 1,549.6371 | 0.076 | 65 |
| FCV | 72–84 | MANDYEDVTVIGK | 1,453.6756 | 1,453.6759 | −0.17 | 111 | |
| FCV | 103–111 | GYDVSFAEE | phos | 1,095.3796 | 1,095.3798 | −0.12 | 31 |
| FCV | 103–111 | GYDVSFAEE | 1,015.4134 | 1,015.4135 | −0.0039 | 42 | |
| MNV | 9–17 | GRPGVFR | 787.4444 | 787.4453 | −1.1 | 32 | |
| MNV | 20–30 | GLTDEEYDEFK | GDP | 1,769.5878 | 1,769.5859 | 1.05 | 36 |
| MNV | 20–30 | GLTDEEYDEFK | 1,344.572 | 1,344.5721 | −0.13 | 64 | |
| MNV | 20–31 | GLTDEEYDEFKK | GDP | 1,897.6834 | 1,897.6808 | 1.36 | 29 |
| MNV | 20–31 | GLTDEEYDEFKK | 1,472.6673 | 1,472.6671 | 0.13 | 25 | |
| MNV | 40–49 | YSIDDYLADR | eth | 1,257.5883 | 1,257.5877 | 0.48 | 70 |
| MNV | 40–49 | YSIDDYLADR | 1,229.5588 | 1,229.5564 | 1.92 | 52 | |
| MNV | 40–51 | YSIDDYLADRER | 1,514.6998 | 1,514.7001 | −0.19 | 23 | |
| MNV | 50–58 | EEELLER | 916.4508 | 916.4501 | 0.72 | 19 | |
| MNV | 50–58 | EREEELLER | 1,201.5946 | 1,201.5938 | 0.64 | 63 | |
| MNV | 50–72 | EREEELLERDEEEAIFGDGFGLK | eth | 2,737.3105 | 2,737.3082 | 0.82 | 11 |
| MNV | 50–72 | EREEELLERDEEEAIFGDGFGLK | 2,709.2807 | 2,709.2769 | 1.39 | 52 | |
| MNV | 52–72 | EEELLERDEEEAIFGDGFGLK | 2,424.1361 | 2,424.1332 | 1.2 | 77 | |
| MNV | 59–72 | DEEEAIFGDGFGLK | 1,525.6944 | 1,525.6936 | 0.48 | 103 | |
| MNV | 85–94 | LGLVSGGDIR | eth | 1,013.5865 | 1,013.5869 | −0.42 | 42 |
| MNV | 85–94 | LGLVSGGDIR | 985.5566 | 985.5556 | 0.92 | 55 | |
| MNV | 97–113 | KPIDWNVVGPSWADDDR | 1,968.9345 | 1,968.933 | 0.75 | 33 |
Note:
phos, phosphorylation; ox, oxidation; eth, ethylation; GDP, guanosine diphosphate; pGp.