Maximum likelihood tree of the dehydrogenase domains in the cellobiose dehydrogenase (CDH) cluster. Coloured circles and numbers mark the positions and counts of characterised enzymes in the tree. Right: Table of properties for the four defined clades of the tree. Listed organisms are sorted according to their appearance in the tree (top to bottom). 1—Hallberg et al. ; 2—Harreither et al. ; 3—Bey et al. ; 4—Stapleton et al. ; 5—Harreither et al. ; 6—Tan et al. ; 7—Xu et al.