Figure 4
From: Phylogenetic analysis reveals dynamic evolution of the poly(A)-binding protein gene family in plants
A class III gene first appears in vascular plants. RRMs (green), PABC domain (blue), RNP1 and RNP2 motifs (lines), and introns (vertical white bars) are indicated for the single PABP gene of C. reinhardtii, the two genes of K. flaccidum, the four progenitor PABP genes of P. patens, and the four genes of S. moellendorffii. A. thaliana PAB7 (At2g36660) is included for comparison. Ancestral introns are indicated with red asterisks. Introns unique to class I/II progenitor PABP genes or class III (PAB7-like) genes are indicated with blue or green asterisks, respectively.