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| Haplotype | Position in amino acid sequence | |||||
| Group | 13 | 82 | 168 | 119 | 191 | 195 |
| Group A (14)* | L (12) | T (13) | V (13) | T (14) | V (14) | V (14) |
| M (2) | I (1) | I (1) | ||||
| Group B (16) | L (16) | T (15) | V (16) | T (15) | V (15) | V (3) |
| M (1) | A (1) | I (1) | I (13) | |||
| Group C (5) | L (5) | T (5) | V (5) | T (5) | V (5) | V (5) |
* No. of haplotypes.
