Table 4.
The distribution of the trinucleotide sequences immediately after the discriminator nucleotide in chloroplast tRNA genes
| Species | 74CCA76 | 74CCN76 | 74CNN76 | Total genes examined | %+ |
|---|---|---|---|---|---|
| Arabidopsis thaliana | 0 | 1 | 11 | 37 | 32 |
| Brachypodium distachyon | 1 | 1 | 8 | 38 | 26 |
| Carica papaya | 0 | 1 | 8 | 37 | 24 |
| Citrus sinensis | 2 | 1 | 7 | 37 | 27 |
| Cucumis sativus | 0 | 1 | 7 | 37 | 22 |
| Eucalyptus grandis | 0 | 1 | 8 | 36 | 25 |
| Glycine max | 0 | 1 | 9 | 37 | 27 |
| Manihot esculenta | 0 | 1 | 7 | 37 | 22 |
| Medicago truncatula | 0 | 0 | 5 | 29 | 17 |
| Oryza sativa japonica | 1 | 2 | 7 | 38 | 26 |
| Populus trichocarpa | 0 | 0 | 10 | 37 | 27 |
| Prunus persica | 0 | 1 | 8 | 37 | 24 |
| Sorghum bicolor | 0 | 2 | 7 | 38 | 24 |
| Vitis vinifera | 0 | 1 | 8 | 37 | 24 |
| Zea mays | 1 | 2 | 7 | 37 | 27 |
Nucleotide sequences of chloroplast tRNA genes and their 3' flanking regions were obtained from the GenBank genome database http://www.ncbi.nlm.nih.gov/genomes/genlist.cgi?taxid=2759&type=4&name=Eukaryotae%20Organelles, the Chloroplast Genome Database (ChloroplastDB; http://chloroplast.cbio.psu.edu/organism.cgi), and the Organelle Genome Database (GOBASE; http://gobase.bcm.umontreal.ca/searches/gene.php). The discriminator nucleotide was predicted using tRNAscan-SE 1.21 http://lowelab.ucsc.edu/tRNAscan-SE/. +Percentage of chloroplast tRNA genes encoding 74CNN76, 74CCN76 and 74CCA76.