Fig. 2

Phylogenetic analysis and classification of 156 COI1 proteins in 19 plant species. The phylogenetic tree was constructed using the maximum likelihood method (JTT + G model, complete deletion, and 1000 bootstrap replicates) using MEGA 6.60 based on the full-length sequences of COI1 proteins. Four colored arcs indicated four groups of COI1 proteins. The different colored shapes corresponded to various species were shown in labels. All the accession numbers of COI1 proteins were listed in Supplemental Table S1