Comparison of the SBMA sperm typing results with mutation frequency data on normal alleles supports the hypothesis that trinucleotide repeat expansions may have a different molecular origin than contractions .
comparison of the sbma sperm typing results with mutation frequency data on normal alleles supports the hypothesis that trinucleotide repeat expansions may have a different molecular origin than contractions .
O O O B-other_name B-cell_type O O O B-other_name I-other_name I-other_name O O B-other_name O O O O B-DNA_domain_or_region I-DNA_domain_or_region B-other_name O O O O O O O B-other_name O