Fig. 1From: Genome-wide identification and characterization of superoxide dismutases in four oyster species reveals functional differentiation in response to biotic and abiotic stressGenome mapping and exon-intron characterization of four oyster species. a, b, c, and d Genome location and gene structure of SODs in Crassostrea gigas, Crassostrea virginica, Crassostrea hongkongensis, and Saccostrea glomerata, respectively. The columns represent the chromosome of each oyster, the blue or yellow columns represent the gene density of each chromosome (a, b, c) or scaffold (d). The gene structure is indicated in green (UTRs), yellow (CDSs), and black lines (introns). The tandem duplicated genes in each species were colored in redBack to article page