passages.id: split_8_test_199_passage
passages.type: progene_text
passages.text: The sequence data ( H. Okamoto et al. , Hepatol. Res. 10 : 1 - 16 , 1998 ) of a newly discovered single - stranded DNA virus , TT virus ( TTV ) , showed that it did not have the terminal structure typical of a parvovirus .