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Unrooted, radial phylogenetic tree of selected starch-debranching enzymes as determined using the PileUp, EprotDist, and EFitch programs of the University of Wisconsin package (version 8; Devereux et al., 1984). The two major branches distinguish the pullulanase type (upper branch) from the isoamylase type (lower branch). The accession numbers of the sequences are shown.
