A. ovalisporum extracts were obtained based on the methods described by
Welker et al. (2002). Briefly, freeze dried cells (0.7 g) were sonicated for 15 min in
5 ml distilled water. The homogenate was stirred for 1 h at room temperature,
centrifuged and the supernatant collected. Five microliters of TFA (0.1%, v/v) was
added to the supernatant, stirred for 1 h, allowed to stand for 3 h and centrifuged a
second time