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冠状病毒S蛋白的氨基酸相似性
Amino acid similarities of the S protein among different coronaviruses (%)
| Sequence | RaTG13 | CoVZC45 | CoVZXC21 | SARS | MERS |
| SARS-CoV-2 | 97.4 | 80.1 | 79.5 | 75.9 | 28.9 |
| RaTG13 | - | 80.1 | 79.5 | 76.5 | 29.1 |
| CoVZC45 | - | - | 98.6 | 75.5 | 29.4 |
| CoVZXC21 | - | - | - | 75.3 | 29.3 |
| SARS | - | - | - | - | 28.9 |
