This cross developed offspring carrying a single mutated allele without the neo cassette. Remarkably, eliminating the neo cassette Nilotinib uncovered a dramatic phenotype
in heterozygote animals, suggesting that the presence of the neo cassette had brought on unequal expression of themutant allele, this was supported by Western evaluation, which demonstrated that GluA2 expression is diminished in GluA2mice. Related reductions in allele expression by intronic insertion of a neomycin cassette have been reported previously.
