The quantitative Matrix of HLA-A31
| Amino acid/positions | P1 | P2 | P3 | P4 | P5 | P6 | P7 | P8 | P9 |
| A | -0.40 | -0.22 | 0.29 | -0.50 | -0.40 | -1.20 | 0.67 | -1.43 | -2.00 |
| C | 0.00 | 0.00 | -0.67 | 1.00 | -2.00 | 0.00 | 0.00 | -0.67 | 0.00 |
| D | -2.00 | -2.00 | -1.20 | -0.67 | 0.00 | -2.00 | 0.00 | -2.00 | -2.00 |
| E | 0.00 | -2.00 | -1.20 | 1.00 | 0.40 | 0.67 | -1.00 | 1.20 | -2.00 |
| F | -2.00 | -2.00 | 1.56 | -0.67 | 0.67 | 0.00 | 1.00 | 1.20 | 0.00 |
| G | -0.40 | -1.00 | -2.00 | -0.22 | 0.67 | 0.00 | -1.43 | 0.67 | -2.00 |
| H | -0.67 | 0.00 | -0.67 | 0.40 | 2.00 | 0.67 | 2.00 | 0.00 | -2.00 |
| I | 0.00 | -1.00 | 0.22 | 0.00 | 0.00 | 1.20 | 2.00 | -2.00 | -2.00 |
| K | 0.67 | -2.00 | 2.00 | 2.00 | 0.40 | -0.67 | -1.20 | 0.50 | 1.06 |
| L | 0.00 | 0.40 | 0.00 | -2.00 | -0.80 | 1.00 | -0.29 | 1.33 | -2.00 |
| M | 0.67 | 0.67 | 0.00 | -2.00 | -2.00 | -2.00 | 2.00 | -2.00 | -2.00 |
| N | -2.00 | -2.00 | 1.00 | 0.67 | 0.00 | 1.20 | -2.00 | -1.00 | -2.00 |
| P | -2.00 | -1.00 | -1.20 | 1.50 | 0.40 | -1.20 | -0.29 | 1.11 | -2.00 |
| Q | 2.00 | -0.67 | -1.20 | -1.00 | 0.00 | -1.33 | 0.00 | 0.40 | -2.00 |
| R | 0.00 | 1.00 | 0.67 | 0.00 | 0.00 | -1.00 | -0.40 | 2.00 | 6.75 |
| S | 0.22 | -0.50 | -1.00 | -1.00 | 0.00 | 0.40 | -0.67 | -2.00 | -2.00 |
| T | 0.00 | 0.67 | -0.67 | -0.67 | -2.00 | 2.00 | -0.40 | 0.40 | -2.00 |
| V | 0.29 | 1.47 | -1.20 | 0.00 | 0.55 | -1.00 | -0.40 | -0.67 | -1.00 |
| W | -2.00 | 0.00 | 0.00 | 1.00 | 0.67 | 0.00 | 2.00 | 0.00 | -2.00 |
| X | 2.00 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.00 | 2.00 | 0.00 |
| Y | 0.67 | -2.00 | 2.00 | 0.00 | 0.00 | 2.00 | 2.00 | -1.20 | -2.00 |
| Thresold(%) | 1% | 2% | 3% | 4% | 5% | 6% | 7% | 8% | 9% | 10% |
| Value | 7.97 | 6.36 | 5.26 | 4.43 | 3.79 | 3.27 | 2.84 | 2.47 | 2.15 | 1.87 |