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Preferential clustering of viral DNA sequences at or near the site of chromosomal rearrangement in fowl adenovirus type 1 DNA-transformed cell lines.

ABSTRACT

All six transformants obtained by inoculating fowl adenovirus type 1 (CELO virus) DNA or its fragments into a rat cell line of normal karyotype had more than 50 copy-equivalents of viral DNA sequences. Each of the transformants had almost all if not all of these viral DNA sequences clustered on a marker chromosome(s). Although the marker chromosome(s) differed from one cell line to another, viral DNA sequences preferentially clustered in or near the achromatic (or light-stained) region of the G-banded marker chromosomes where chromosomal rearrangement or translocation occurred. These results indicate that no particular chromosome is required to act as the integration site of viral DNA for the transformation of cells, but chromosomal rearrangement at or near the cluster of viral DNA sequences might contribute to the transformation.