Table 1.

Genome-wide nucleotide composition at the third position of the codons in the viral strains.

Accession	T	C	A	G
GD410721	42.71%	16.17%	28.55%	12.57%
GX_P1E	42.52%	16.40%	28.27%	12.81%
RaTG13	43.57%	15.74%	27.98%	12.71%
RmYN02	43.31%	15.90%	27.98%	12.81%
Wuhan-Hu-1	43.49%	15.73%	28.16%	12.62%

The nucleotide compositions at the first and second positions can be found in Supplementary Table S1.