.... in Retroviruses , eds Coffin J.M. , Hughes S.H. , Varmus H. ( Cold Spring Harbor Laboratory Press , Cold Spring Harbor,
NY ). ↵ Bowen N.J. , McDonald J.F. ( 1999 ) Genomic analysis of Caenorhabditis elegans reveals ancient families of retroviral-like elements. Genome Res. 9 : 924 – 935 . ↵ Britten R.J. ( 1995...