Species Human Chimpanzee Cattle Dog Mouse Zebrafish
Nucleotide A(%) 0.2609 0.2551 0.2693 0.2762 0.2628 0.2765
Nucleotide T(%) 0.1872 0.1928 0.1930 0.2116 0.2028 0.2415
Nucleotide C(%) 0.2738 0.2724 0.2604 0.2453 0.2592 0.2207
Nucleotide G(%) 0.2781 0.2797 0.2764 0.2669 0.2753 0.2613
Table 2: Nucleotide composition in mRNA sequences in different species.