Figure sup 7. Trees of the other ABC genes. A) The Dictyostelium member of the ArsA family clusters with plant and animal homologs more closely than do yeast genes. B) No eukaryotic homologs of ABCH.1 and ABCH.2 were recognizable which are both closely related to the Escherichia coli gene Ec YbbA and to bacterial genes involved in the uptake of polar amino acids.