tokens: Previous work has shown that spleen necrosis virus ( SNV ) long terminal repeats ( LTRs ) are associated with Rex / Rex responsive element independent expression of bovine leukemia virus RNA and supports the hypothesis that SNV RNA contains a cis acting element that interacts with cellular Rex like proteins .
folded_tokens: previous work have show that spleen necrosis virus ( snv ) long terminal repeat ( ltr ) be associate with rex / rex responsive element independent expression of bovine leukemia virus rna and support the hypothesis that snv rna contain a ci act element that interact with cellular rex like protein .