Table 2.
Sequence analysis of amino acids 8–27 in S2 protein from 314 IBV strains.
| Genotypes | Sequences of amino acids 8–27 in S2 protein | |
|---|---|---|
| Group Ⅰ (136/328) | GI-1, GI-2, GI-3, GI-4, GI-5, GI-6, GI-8, GI-9, GI-11, GI-12, GI-13, GI-14, GI-16, GI-21, GI-22, GI-26, GII-1, GIV-1, GVI-1 | NCPYVSYGKFCIKPDGSIST |
| NCPYVSYGKFCIKPDGSIAT | ||
| NCPYVSYGKFCIKPDGSLFI | ||
| NCPYVSYGKFCIKPDGSVSP | ||
| NCPYVSYGKFCIKPDGSISV | ||
| NCPYVSYGKFCIKPDGSVSE | ||
| NCPYVSYGKFCIKPDGLIAT | ||
| HCPYVSYGKFCIKPDGDLSV | ||
| SCPYVSYGKFCIKPDGSIST | ||
| QCPYVSYGKFCIKPDGDLSV | ||
| RCPYVSYGKFCIKPDGSLKT | ||
| Group Ⅱ (192/328) | GI-7, GI-19, GI-22 | SCSYVSYGRFCIEPDGSLKM |
| SCPYVSYGRYCIEPDGSLKQ | ||
| SCSYVSYGRFCIQPDGSIKQ | ||
| SCPYVSYGRFCIEPDGSLKM | ||
| SCPYVSYGRFCIQPDGSIKQ | ||
| SCSYVSYGRFCIEPDGSLKL | ||
| SCSHVSYGRFCIEPDGSLKM | ||
| SCHYVSYGRFCIQPDGSIKQ | ||
| SCPYVTYGRFCIQPDGSIKQ | ||
| SCNYVSYGRFCIQPDGSIKQ | ||
| SCPFVSYGRFCIEPDGSLKT | ||
| TCPFVSYGRFCIKPDGLVSE | ||
| SCPYVSYGRYCIEPDGSLKK | ||
| SCSYVSYGRFCIEPDGSLKP |
Notes: Red highlighting indicates differences in amino acid 16, which were used for grouping.