Alignment of the sequence from trnR-ACG to ψtrnT-UGU in Alsophila and corresponding region in Adiantum. Comparison by using online zPicture software with ECR criteria of ≥ 100 bp and ≥ 70% identity http://zpicture.dcode.org/. Similarities between aligned regions are shown as average percent identity. The cluster of arrows denotes the location of the highly repeated 565-bp-region in the Alsophila cp genome. *, an intact trnT-UGU was identified in Adiantum, while a trnT-UGU pseudogene was found in Alsophila.