PCR products digested by enzyme RsaI and separated on 2% agarose gel. Lanes 1 and 9, the 100-bp DNA ladder (Gibco BRL) used as a size marker; lane 2, T pattern (A. tubingensis CECT 20393 strain); lane 3, N-pattern (A. niger CECT 2807 strain); lanes 4, 5, 7, and 8, isolates Bo44, Bo56, Bo66, and Mn24, respectively; lane 6, isolate Bo62.