Determination of molecular masses of purified G. graminis var. tritici laccase and laccase subunits. (A) Lane 1, molecular size standards (silver stain); lane 2, native laccase (silver stain); lane 3, native laccase (activity stain with DMOP); lane 4, native and denatured laccase (silver stain). (B) Lane 1, molecular size standards (silver stain); lane 2, denatured laccase (silver stain); lane 3, denatured, deglycosylated laccase (60 kDa) and PNGase F deglycosylase (36 kDa; silver stain).