Fig. 3.

Archaeplastida non-KNOX group TALEs possess a PBC-like domain (PBL) consisting of N-terminal MEINOX homology and C-terminal PBC-B homology. Amino acid letters in black with gray shades, in white with light shades, and in white with black shades show more than 60%, 80%, or 100% similarity in each column. Inverse red triangles indicate the discarded sequences in un-aligned insertions. a PBL-Glauco domain alignment, including two Glaucophyta sequences sharing homology in both MEINOX homology and C-terminal half of the PBC-B domain with non-Archaeplastida TALE sequences. Red box indicates the ELK domain. b PBL-Red domain alignment. All Rhodophyta non-KNOX sequences possess a PBL domain with poor MEINOX homology. c PBL-Chloro domain alignment. Cyanophora_paradox_20927.63 is included for comparison. Picocystis_salinarum_02499 is a founding member of GLX class with a PBL-Chloro domain. d Comparison among PBL domains. The top row shows the consensus made from the alignment of (a), (b), and (c) combined and the lower consensus sequences are collected from the individual alignments presented in (a), (b), and (c)