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Phylogenetic tree of species that encode HPt proteins with extended N-terminal region. Different species with stand-alone HPt proteins which exhibit an extended N-terminal region were used to generate a phylogenetic tree. Escherichia coli was used as an outgroup and is designated in gray. Purple represents the Fungi kingdom, orange the phylum Zygomycota, green Basidiomycota and blue Ascomycota. Pathogenic organisms are denoted by a asterisk sign and extremophiles by a plus sign.
