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The total number and percentage of invariant residue positions among 1273 positions in unique S proteins.
| Frequency of invariant residue positions in unique S proteins from each continent | ||||||
|---|---|---|---|---|---|---|
| Africa | Asia | Europe | Oceania | South America | North America | |
| Total freq. | 902 | 695 | 948 | 731 | 1070 | 89 |
| Percentage | 70.86 | 54.60 | 74.47 | 57.42 | 84.05 | 6.99 |
