FIGURE 2.
Example of sequence conservation within phylogenetic subgroups: the case of tRNAAsp. (A) Outputs of database searches. Consensus sequences obtained for indicated subgroups. The number of considered sequences is indicated in parenthesis. Y stands for pyrimidine, R for purine. The color code for nucleotides is the following: green stands for 100% conservation, blue for >90% conservation, white for >50% conservation. The color code for base pairing is the following: green for 100% conservation of Watson–Crick (WC) pairs, blue for high frequency of WC pairs and <50% G–T pairs, white for high frequency of WC and G–T pairs but <50% mismatches. Specific nucleotide positions of interest (discussed in the text) are pointed by arrows. (B) Overview of the phylogenetic links of the considered examples.