Table 6.
Identification of viral proteins from reconstituted clinical material spiked with viruses.
| Virus | Titera | Average sequence coverage of identified proteinsb (%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| NP | M1 | NS1 | HA | NA | PA | M2-1 | F | P | ||
| H3N2 | 109c | 69 | 71 | 32 | 13 | 12 | 0 | ND | ND | ND |
| 108 | 25 | 27 | 0 | 0 | 0 | 0 | ND | ND | ND | |
| 107 | 4 | 4 | 0 | 0 | 0 | 0 | ND | ND | ND | |
| H1N1 | 109c | 68 | 77 | 71 | 0 | 7 | 3 | ND | ND | ND |
| 108 | 24 | 14 | 9 | 0 | 0 | 0 | ND | ND | ND | |
| RSV | 109c | 54 | 54 | 27.3 | ND | ND | ND | 35 | 9 | 31 |
| 108 | 3 | 35 | ND | ND | ND | ND | 15 | 0 | 17 | |
| hMPV | 107c | 25 | 48 | ND | ND | ND | ND | 16 | 28 | 19 |
| 106 | 0 | 0 | ND | ND | ND | ND | 0 | 0 | 6d | |
| Neg. control | Throat swab | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Total genome copy number of the tested influenza virus and RSV in a total sample volume subjected to LC–MS/MS analysis.
An average sequence coverage (%) of the identified protein was calculated from two independent experiments. A protein was considered identified when the MASCOT score was ≥50 and when a minimum of two peptides with a score ≥20 was identified in the protein. NP, nucleoprotein; M1, matrix protein; NS1, non-structural protein 1; HA, hemagglutinin; NA, neuraminidase; M2-1, matrix protein; F, fusion glycoprotein; P, phosphoprotein.
Positive control; isolation of the virus was without throat swab material.
Only in one of the two tested samples peptides were detected.