Fig. 3

Gene structure and protein motif analysis of GhDAMT and GhALKBH protein families. A Evolutionary tree, intron/exon structure, and protein motif of six GhDAMT family proteins. B Evolutionary tree, intron/exon structure, and protein motif of 17 GhALKBH family proteins. A, B The phylogenetic tree was constructed using MEGA while the scale at the bottom presented the length of the protein. Gray boxes indicated exons whereas black lines indicate introns. The different colored boxes at the right side indicated 1–8 protein motifs in 6 GhDAMT and 17 GhALKBH proteins. a, family phylogenetic tree analysis; b, gene structure; c, protein domain