All tissues and cells studied were homozygous for the wild-type gene , and were heterozygous as well as homozygous for the codon-10-variant type .
all tissues and cells studied were homozygous for the wild-type gene , and were heterozygous as well as homozygous for the codon-10-variant type .
O B-tissue O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O