FIG. 3.

Application of laccase for strain improvement. (A) A. niger strain improvement for laccase production. Strain 14-5 was mutagenized, and strains were selected which produced bigger ABTS halos on agar plates. Strain 14-5W was selected, and laccase production was compared to that of the wild type in liquid culture. Activities are given in units per ml of culture supernatant. (B) LccC-expressing A. nidulans and wild-type A. nidulans were inoculated in liquid culture (threonine medium supplemented with 1 mM ABTS) in microtiter plates.