Evolutionary relationships of CIA6 among 13 taxa. Phylogenetic analyses were conducted in MEGA4 (Tamura et al., 2007). Each protein is designated by the abbreviation of its scientific name and its NCBI accession number. The species are as follows: Chlamydomonas reinhardtii, Volvox carteri f. nagariensis, Micromonas pusilla CCMP1545, Physcomitrella patens subsp. patens, Vitis vinifera, Ricinus communis, Selaginella moellendorffii, Micromonas sp. RCC299, Populus trichocarpa, Arabidopsis thaliana, Arabidopsis lyrata subsp. lyrata, Sorghum bicolor, and Oryza sativa.