Fig. 2.

A: Maximum likelihood phylogenetic reconstruction reveals possible orthologous relationships among iGluR genes from representative mollusks and metazoan taxa. Numbers on the nodes represent support from 10,000 pseudoreplicates of the ultrafast bootstrap procedure. The branch of molluscan iGluR genes were denoted in light blue. The 36 iGluR genes of P. maximus were highlighted in red. B: Maximum likelihood phylogram of molluscan GluF genes. The branch of GluF genes of amphioxus, hemichordate, echinoderm, and molluscs were denoted in red, orange, yellow, and green, respectively. The six GluF genes of P. maximus were highlighted in red. Abbreviations of species, A. californica (Aca), T. granosa (Tgr), C. sinensis (Csi), E. chlorotica (Ech), P. f. martensii (Pfm), S. broughtonii (Sbr), S. constricta (Sco), B. platifrons (Bpl), C. gigas (Cgi), L. gigantea (Lgi), M. philippinarum (Mph), O. bimaculoides (Obi), O. minor (Omi), B. glabrata (Bgl), A. farreri (Afa), C. squamiferum (Csq), G. aegis (Gae), H. maculosa (Hma), P. canaliculata (Pca), P. maximus (Pma), M. yessoensis (Mye), Strongylocentrotus purpuratus (Spu), Saccoglossus kowalevskii (Sko), B. floridae (Bfl), A. thaliana (Ath). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)