Fig. 6From: Molecular evolution of the ATP-binding cassette subfamily G member 2 gene subfamily and its paralogs in birdsPhylogenetic analysis (a), gene exons/intron structure (b) structures and protein domain structures (c) of the ABCG2-like genes in birds. The phylogenetic tree of the amino acid sequences was constructed with the NJ method using MEGA7 software. The numbers on the nodes represent the bootstrap support. The red boxes and black lines (drawn to scale) represent the exons and introns, respectively. The protein motifs are shown as colored boxes based on the MEME identificationBack to article page