tokens: High-affinity binding of NF-1 to PSE-B , but not to PSE-A , was confirmed by competition of DNA protein interactions by using NF-1 DNA elements and antibodies .
folded_tokens: high-affinity binding of nf-1 to pse-b , but not to pse-a , be confirm by competition of dna protein interaction by use nf-1 dna element and antibody .