TABLE 1.
Distribution of sequences homologous to the X box of MHC class II genes within the genomes of randomly selected human viruses
| GenBank entry | Virus | Genome length (bp) | No. of elements homologous to X box
|
Frequency of X-like motifsa | ||
|---|---|---|---|---|---|---|
| 90% | 80% | 70% | ||||
| HIVHXB2CG | HIV-1 | 9,718 | 2 | 11 | 68 | 7 |
| HPA | Hepatitis A virus | 7,478 | 1 | 7 | 45 | 6 |
| HIV2BEN | HIV-2 | 10,359 | 1 | 8 | 49 | 4.7 |
| HRV | Rhinovirus | 7,212 | 0 | 3 | 33 | 4.6 |
| HPBADR | Hepatitis B virus | 3,188 | 0 | 0 | 11 | 3.4 |
| HS5HCMVCG | Cytomegalovirus | 229,354 | 8 | 85 | 744 | 3.2 |
| PPL | Papovavirus | 5,270 | 0 | 1 | 15 | 2.8 |
| POL1SAB | Poliovirus | 7,441 | 0 | 1 | 19 | 2.5 |
| VA2CG | Varicella-zoster virus | 124,884 | 3 | 33 | 308 | 2.5 |
| HS4 | Epstein-Barr virus | 172,282 | 6 | 50 | 380 | 2.2 |
| HS11CG | Herpes simplex virus type 1 | 152,260 | 0 | 14 | 240 | 1.6 |
a
The number of X-like motifs at least 70% homologous to the X box of the HLA-DRA gene per 1,000 bp of genome.