Construct: A genomic BglII-XhoI fragment from the 5' region of N from the Nfa-swb mutant allele.
N-fa-swb-INSBglII-XhoI.fa shows substantially reduced enhancer blocking activity compared to N-fa-swb-INSBglII-XhoI.
N-fa-swb-INSBglII-XhoI.fa shows substantially reduced enhancer blocking activity compared to N-fa-swb-INSBglII-XhoI.