tokens: The molecular mechanism involved in the process of antigen-driven somatic hypermutation of Ig genes is unknown , but it is commonly believed that this mechanism is restricted to the Ig loci .
folded_tokens: the molecular mechanism involved in the process of antigen-driven somatic hypermutation of ig genes is unknown , but it is commonly believed that this mechanism is restricted to the ig loci .
labels: O O O O O O O O O B-other_name I-other_name O B-DNA_family_or_group I-DNA_family_or_group O O O O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O