title: Inversely repeating integrated hepatitis B virus DNA and cellular flanking sequences in the human hepatoma-derived cell line huSP.
abstract: Among recombinant phages carrying integrated hepatitis B virus (HBV) DNA sequences cloned from the human hepatoma-derived cell line huSP, one clone, lambda hu-489, revealed some unusual features. The 2.25-kilobase Eco D fragment from the insert of this clone hybridized to the HBV DNA probe only and its nucleotide sequence was determined. The viral sequence, as well as a cellular flanking sequence, showed extensive rearrangement accompanied by inverted repetition. The Eco D fragment contained HBV DNA from the 5'-end region of gene S to the middle of gene X, followed by a long cellular flanking sequence. Moreover, a part of gene X was found inversely repeated at the head of the same gene S in a head-to-head configuration truncated by the same cellular sequence. Therefore, the same junction sequence of viral DNA and the cellular sequence was found at two different sites in the Eco D fragment in opposite polarities.
authors.forename: H
authors.initials: H
authors.lastname: Mizusawa
authors.forename: M
authors.initials: M
authors.lastname: Taira
authors.forename: K
authors.initials: K
authors.lastname: Yaginuma
authors.forename: M
authors.initials: M
authors.lastname: Kobayashi
authors.forename: E
authors.initials: E
authors.lastname: Yoshida
authors.forename: K
authors.initials: K
authors.lastname: Koike
mesh_terms: D001483:Base Sequence; D006528:Carcinoma, Hepatocellular / Q000235:genetics / Q000382:microbiology*; D002460:Cell Line; D004273:DNA, Neoplasm / Q000235:genetics; D004279:DNA, Viral / Q000235:genetics; D008040:Genetic Linkage; D006515:Hepatitis B virus / Q000235:genetics*; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics / Q000382:microbiology*; D008970:Molecular Weight; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D004273:DNA, Neoplasm; D004279:DNA, Viral