Table 4. Correlation between the 20 critical composition features of overlapping genes and the first (PC1), second (PC2), and third (PC3) principal component.
| Composition feature | PC1 | PC2 | PC3 |
|---|---|---|---|
| A | 0.76 | 0.24 | -0.26 |
| T | -0.18 | -0.94 | 0.19 |
| C | -0.70 | 0.59 | 0.23 |
| AT | 0.23 | -0.70 | 0.09 |
| TA | 0.18 | -0.67 | -0.08 |
| TT | -0.12 | -0.83 | 0.18 |
| CG | -0.41 | 0.41 | -0.24 |
| CC | -0.58 | 0.64 | 0.16 |
| Arginine | 0.05 | 0.20 | -0.84 |
| Serine | -0.49 | -0.30 | -0.03 |
| Proline | -0.56 | 0.52 | 0.14 |
| Tyrosine | 0.18 | -0.55 | 0.00 |
| Isoleucine | 0.10 | -0.55 | 0.14 |
| High-degeneracy amino acids | -0.48 | -0.49 | -0.60 |
| Low-degeneracy amino acids | 0.91 | -0.02 | 0.16 |
| CGA (Arg) | 0.22 | 0.10 | -0.61 |
| TCG (Ser) | -0.18 | -0.13 | 0.07 |
| CCC (Pro) | -0.42 | 0.52 | 0.17 |
| CCG (Pro) | -0.46 | 0.27 | 0.07 |
| TAT (Tyr) | 0.24 | -0.48 | -0.09 |