Fig. 3
From: Placing human gene families into their evolutionary context
Number of intact chemoreceptors in available tetrapod genomes harvested using methods described in Yohe et al. [147]. Chemoreceptors include olfactory receptor genes (Class I and Class II), vomeronasal receptor (type 1 and type 2) genes, γ-c receptor genes, and trace amine-associated receptors. These counts include genes with > 650-bp open reading frames and do not include any pseudogenes. Silhouettes are from PhyloPic