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Phylogenetic tree of the egg-coat ZP genes and representative ZP module-containing genes retrieved from the PFAM database. The ML tree was obtained based on 160 amino acid sites using Fasttree v2.1.9 with the LG+CAT model. The statistical support (local support values for FastTree) is indicated on the nodes. The tree is arbitrarily rooted on the midpoint. The scale bars indicate the average number of amino acid substitutions per site.
