Fig. 3
From: Evolutionary significance and diversification of the phosphoglucose isomerase genes in vertebrates
Principal component analysis map showing the distribution of PGI genes in different vertebrates according to their exon length. The name given to the PGI gene on the PCA plot represents the initials of the scientific name of each species, followed by a number which refer to the isoform. The blue color indicates the exon. The red color represents all vertebrate PGI clustered together in the same group while the green indicates exceptions, i.e. PGI genes isolated from this group