Fig. 2

Phylogenetic relationships, gene-structure analysis, and motif distributions of CqTH trihelix genes. A Phylogenetic tree was constructed based on the full-length sequences of CqTH proteins using the NJ method with 1000 replicates on each node, including group SIP1, GTγ, GT1, GT2, and SH4. B The motif composition of the CqTH proteins. The motifs, numbered 1–10, are displayed in different colored boxes. The sequence information for each motif is provided in Additional file 2. The length of the protein can be estimated using the scale at the bottom. C Exon-intron structures of CqTH genes. Yellow boxes indicate untranslated 5′- and 3′- regions; Blue-green boxes indicate exons; and black lines indicate introns