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Figure 3 | Human Genomics

Figure 3

From: Evolutionary dynamics of olfactory receptor genes in chordates: interaction between environments and genomic contents

Figure 3

(a) Neighbour-joining phylogenetic tree containing all functional olfactory receptors (OR) genes in the amphioxus, lamprey, zebrafish and human. Non-OR G-protein coupled receptor (GPCR) genes were used as the outgroup. The Type 2 clade contains several non-OR genes that are not included in group η[14]. Bootstrap values obtained from 500 resamplings are shown for major clades. A scale bar represents the estimated number of amino acid substitutions per site. Adapted from Niimura (2009)[14]. (b) Numbers of functional OR genes (including truncated genes) belonging to groups α - η in teleost fish and tetrapods.[14]

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Human Genomics

ISSN: 1479-7364