The filamentous fungi A. terreus was isolated from the natural composting of textiles and maintained in the fungus culture collection of the Enzymology Laboratory, University of Brasilia, Brazil, in PDA medium (2% potato broth, 2% dextrose and 2% agar). The production and purification of XylT1 and XylT2 was carried out as described elsewhere (Moreira et al., 2013).