The Proviral Genome of Radiation Leukemia Virus: Molecular Cloning, Nucleotide Sequence of Its Long Terminal Repeat and Integration in Lymphoma Cell DNA
The proviral genome of a thymotropic and leukemogenic C57BL/Ka mouse retrovirus, RadLV/VL3(T+L+), was cloned as a biologically active PstI insert in the bacterial plasmid pBR322. Its restriction map was compared to those, already known, of two nonthymotropic and nonleukemogenic viruses of the same mouse strain, the ecotropic BL/Ka(B) and the xenotropic constituent of the radiation leukemia virus complex (RadLV). Differences were observed in the pol gene and in the env gene. Moreover, the nucleotide sequence of the RadLV/VL3(T+L+) long terminal repeat revealed the existence of two copies of a 42 bp long sequence, separated by 11 nucleotides and of which BL/Ka(B) possesses only one copy.
KeywordsLong Terminal Repeat Long Terminal Repeat Sequence Avian Leukosis Virus Proviral Genome Thymic Lymphoma
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