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. 2009 Mar 2;26(5):953–956. doi: 10.1093/molbev/msp038

Table 1.

N Content of Genetic Informational Molecules

Species Genome
Transcriptome
Proteome
No. of Bases N Content No. of Genes No. of Bases N Content
No. of Proteins No. of Residues N Content
Mean SD Mean SD
Arabidopsis thaliana 119 × 106 3.680** 26,544 24 × 106 3.485** 0.113 31,921 13 × 106 0.364** 0.079
Drosophila melanogaster 128 × 106 3.711 18,042 113 × 106 3.643 0.101 20,736 11 × 106 0.386 0.085
Homo sapiens 2.8 × 109 3.704 25,022 1.5 × 109 3.701 0.076 25,305 14 × 106 0.377 0.078

NOTE.—N content is the number of N atoms per monomer. The number of genes is lower than the number of proteins because genes without introns cannot be used for transcriptome analyses. Only experimentally validated isoforms were included for each gene. Standard deviations (SD) are shown, wherever appropriate, because the standard errors are close to zero due to very large sample sizes.

**

Cases where the observed differences between the plant and animal genomes were significant at P « 0.01 in Student's t-test or the Fisher's exact test.