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Phylogenetic analysis of the α-amylase protein sequences from all nematodes and representatives of bacteria, fungi and other animals. Different branch colours represent different organisms (red for nematodes, blue for fungi, brown for bacteria, purple for invertebrates and green for vertebrates). Taxon names are coloured for different nematodes (dark green for plant nematodes, dark red for animal parasitic nematodes and blue for free-living nematodes).
