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. 2023 Aug 31;24:508. doi: 10.1186/s12864-023-09597-7

Fig. 4.

Fig. 4

Comparison of the G + C content of genomic elements between the polar and deep-earth group and the reference group. Local G + C content of GC1, GC2 and GC3 (i.e. G + C composition at the first, second and third sites of genetic codons) (Wilcoxon test; *, p < 0.05; **, p < 0.01; ***, p < 0.005; NS, not significant; RNA including tRNA and rRNA)