Figure 6

Genomic structure and location of Latimeria v1r and t2r genes. Panel A, phylogenetic origin of introns in the V1R/ora family. The subtree is taken from Figure 3; numbers indicate % branch support; black diamonds, intron gains. Panel B, comparison of the Latimeria V1R1/2 and V1R3/4 clades with the ORA1/2 and ORA3/4 gene pairs of teleosts. Numbers correspond to gene names; magenta triangles, Latimeria v1r genes; grey triangles, zebrafish genes; triangle pointing left, + strand; triangle pointing right, - strand; all gene distances drawn to scale. Panel C, Latimeria t2r gene clusters, full length of contigs is shown; numbers correspond to gene names; magenta triangles, Latimeria t2r genes; triangle pointing left, + strand; triangle pointing right, - strand; all gene distances drawn to scale. In comparison with an independent assembly [20], two contigs containing three and six genes (T2R25, 22, 42 and T2R29, 58, 28, 31, 32, 66, respectively), merge into a larger cluster of nine genes.