Figure 5.

Phylogenetic relationships of TART, HeT-A, Doc, and jockey elements in different Drosophila species. Neighbor-joining trees for the protein sequences are shown. (The UPGMA trees yield the same relationships as do the nucleotide trees.) Bootstrap tests were performed with 500 replications and a cut-off value of 50% for the consensus tree. Numbers indicate bootstrap values of >40% in the corresponding node. Scale bar corresponds to the P value (number of differences normalized by the number of total residues). Elements are indicted by the first three letters of the species (fun, Drosophila funebris). Note that TART^yak2 groups with TART^melC as proposed (7). Gag from TART^yak was not included because all of the fragments cloned to date are 5′ truncated. GenBank accession numbers: jockey^mel ORF1, M22874; ORF2, AAA28675; jockey^fun, PIR:B38418; Doc, CAA35587.