Figure 2From: The sea lamprey Petromyzon marinusgenome reveals the early origin of several chemosensory receptor families in the vertebrate lineagePhylogenetic analysis of intact single exon OR and TAAR genes in Petromyzon marinus. Genes are identified by a supercontig number followed by a gene family designation and predicted amino acid length. The neighbor-joining tree was constructed using CLUSTALW-aligned amino acid sequences and distances were computed using the JTT protein matrix. Confirmed expression is denoted by an asterisk (*), and solid circles represent life stage in which expression was detected by 454 and EST sequencing (red, adult and parasite olfactory organ 454; blue, adult olfactory organ 454; green, parasite olfactory organ 454; and purple, embryo EST). Branch lengths are included and statistical support is given as a percentage of 1000 bootstrap replicates.Back to article page