-!- A number of aldoses and ketoses in pyranose form, as well as glycosides, gluco-oligosaccharides, sucrose and lactose can act as a donor. -!- 1,4-benzoquinone or ferricenium ion (ferrocene oxidized by removal of one electron) can serve as acceptor. -!- Unlike EC 1.1.3.10, this fungal enzyme does not interact with O(2) and exhibits extremely broad substrate tolerance with variable regioselectivity (C-3, C-2 or C-3 + C-2 or C-3 + C-4) for (di)oxidation of different sugars. -!- D-glucose is exclusively or preferentially oxidized at C-3 (depending on the enzyme source), but can also be oxidized at C-2 + C-3. -!- The enzyme also acts on 1->4-alpha- and 1->4-beta-gluco- oligosaccharides, non-reducing gluco-oligosaccharides and L-arabinose, which are not substrates of EC 1.1.3.10. -!- Sugars are oxidized in their pyranose but not in their furanose form.