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EMSA of NorL/NorLbp DNA-protein complex in the A. parasiticus nor-1 promoter. Twenty femtomoles of radiolabeled oligonucleotide 206/244 was used as a probe with 32 μg of protein extract from SU-1 or AFS10 grown under aflatoxin-inducing conditions. EMSA competitors (206/244 and 206/244mut) were used in a 250-fold excess. The positions of DNA-protein complexes containing NorLbp and protein A are indicated by arrows.
