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Figure 3 | BMC Evolutionary Biology

Figure 3

From: Evolution and origin of vomeronasal-type odorant receptor gene repertoire in fishes

Figure 3

Phylogenetic relationships of fish V2Rs and related GPCRs. The tree is reconstructed by the neighbor-joining method with protein JTT matrix distances. Bootstrap values are shown on the major internal node only. The triangles and squares at the tips of the tree indicate species: open triangle, zebrafish; solid triangle, medaka; open square, pufferfish; solid square, fugu. Five fugu and two goldfish V2Rs used for constructing the profile HMM are shown in the tree. Solid circles at internal nodes indicate the position of the most recent common ancestor between teleost fishes and tetrapods. Open circles indicate the position of the most recent common ancestor among four fishes. Colors of each vertical bar indicate subfamilies in the fish V2R gene family. Genbank accession numbers of known V2Rs and related GPCRs used in this analysis are as follows: goldfish V2Rs (AF083080, AF083081), fugu V2Rs (AB008858–AB008862), mouse V2Rs (XP_144968, XP_145559, XP_142496), rat V2Rs (NP_775440–NP_775442), a V2R of Xenopus laevis (AB113361), CaSRs (AAF77923, AAT06805, AB008857, A56715, AAD40638, P48442), GPRC6As (AF158963, AY770492, XP_426177, NP_683766, CAD59483), mouse family C V2R (NP_064302, AAC08413).

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