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Identification of two spp1 (spp1-1 and spp1-2) genes and genomic comparison of neighboring genes in American paddlefish and spotted gar. Each polygon marks to a gene (A). The yellow polygons represent hits between the spotted gar and American paddlefish, whereas the gray polygons indicate no hits. The red polygons are spp1 genes. Gene structures of the identified spp1 genes in American paddlefish and sterlet are provided (B). Each yellow box represents an exon.
