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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: Molecular evolution of the ATP-binding cassette subfamily G member 2 gene subfamily and its paralogs in birds

Fig. 4

Exon structure (5′-3′) and splicing sites of the ABCG2 and ABCG2-like genes in each birds and outgroup species in series or sections. The numbers in the boxes are the nucleotide lengths. The order of each exon is indicated in the first row. The red exon is conserved in all bird ABCG2 and ABCG2-like genes. The size of each exon is not drawn to scale

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