Fig. 1
From: Evolutionary dynamics of olfactory and other chemosensory receptor genes in vertebrates
Distribution of olfactory receptor (OR) genes in human chromosomes. Vertical bars above and below the chromosomes indicate locations of OR functional genes and pseudogenes respectively. The height of each bar represents the number of OR genes in a non-overlapping 500-kb window at the position. Chromosomes 20 and Y are omitted, because OR genes were not found in these chromosomes. Modified from Niimura and Nei (2003).
