| ANCOVA | Analysis of covariance |
| CDS | Coding DNA sequence |
| CUB | Codon usage bias |
| ENC | Effective number of codons |
| FDR | False discovery rate |
| FOP | Frequency of optimal codons |
| LOESS | Locally weighted scatterplot smoothing |
| PR2 | Parity Rule 2 |
| RSCU | Relative synonymous codon usage |
| SCO | Single-copy ortholog |