Northern analyses suggested that the reiterated splicing sites of the representative mutants were all used in RNA splicing , and the closest donor and recipient joints were used most frequently .
northern analyses suggested that the reiterated splicing sites of the representative mutants were all used in rna splicing , and the closest donor and recipient joints were used most frequently .
O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O O O O O O O O O O O O O