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Boot-strapped (1,000) neighbor-joining tree generated from a ClustalX alignment of the Bma-AVR-14A and -B sequences and sequences of GluCls from other parasitic nematodes and C. elegans. Outgroup sequence for this tree was set with a γ-aminobutyric acid receptor subunit from C. elegans (Cel-UNC-49A). I, nonsusceptible or unknown susceptibility to IVM; II, susceptible to IVM.
