tokens: Packaging of viral particles , integration into the target genome , and stability of the integrated provirus are not affected by the LTR modification .
folded_tokens: packaging of viral particles , integration into the target genome , and stability of the integrated provirus are not affected by the ltr modification .
labels: O O O O O O O O O O O O O O O B-virus I-virus O O O O O B-DNA_domain_or_region O O