Fig 4. Phylogenetic relationships of Ots TSA spacer domains.

All the ATs from each of three spacer domains S-VDI, S-VDII/III and S-VDIII of Indian and South Korean TSA were used for constructing individual Neighbor-Joining phylogenetic trees using their amino acid sequences. The TSA country of origin, the AT type and number of samples with that AT domain type are indicated for each unique AT type for each data set (S3 Table) (e.g., India-24-18). The pairs of identical 12 AT present in both India and South Korea TSAs are highlighted with red circles. Only the nodes with ≥70 bootstrap values are shown (1000 bootstraps). The bracket values show the scale for amino acid differences for each domain.