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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Structural differences and differential expression among rhabdomeric opsins reveal functional change after gene duplication in the bay scallop, Argopecten irradians (Pectinidae)

Fig. 2

Maximum likelihood (ML) topology of Gq-opsins. The phylogenetic tree is based on aligned amino acid sequences with scallop Go-opsin as the outgroup. Support values (>50%) of nodes were generated by 1000 bootstrap replicates in RAxML. Support values after the ‘/’ are posterior probabilities from a Bayesian phylogenetic analysis (BI). Support values <50% are indicated by a ‘-’. The single difference between the ML and BI topologies occurs within the bivalve Gq-opsin clade (green) and is highlighted with an asterisk ‘*’. Argopecten irradians Gq-opsins (Air-OPNGqs) from this study are in bold. Two molluscan Gq-opsin clades were recovered, but only one clade (green) contained scallop Gq-opsins from Argopecten irradians (Air-OPNGqs), Mizuhopecten yessoensis (Mye-OPNGqs), or Placopecten magellanicus (Pma-OPNGqs). Two large clades of arthropod opsins that represent UV and long-wavelength (LW) opsins and a vertebrate Gi–opsin clade were collapsed for space

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