Supplementary Materials Primer Sequences Primer sequences for TEs belonging to the hAT superfamily (Figure 1B) were generated from consensus sequences corresponding to each element ID found on TEfam (http://tefam.biochem.vt.edu/tefam/) or REPbase (http://www.girinst.org/repbase/index.html) and can be found in Supplementary Table 1. Adapter length was 10 bps, primer mismatch value was 5 and the restriction enzyme used was MseI, which has a recognition site of TTAA. The primer sequences for mPing in different varieties of O. sativa (Figure 1C) were the same as those described in Jiang et al. (2002). The length of the adaptor was 19 bp, primer mismatch value was 0 and the restriction enzyme was MseI. For the TF000720 element (Figure 1D), the pre-amplification primer sequence was 5’ GGCAAGCTGAAGTTATCTTG 3’ and the selective amplification primer sequence was 5’ TTTCGTGTGTAGTATCT 3’. The adapter length was 21 bps and the restriction enzyme used was MseI. Sources for Genomic Sequence Databases The genomic sequence of A. aegypti was downloaded from Vectorbase (www.vectorbase.org), A. thaliana from TAIR (www.arabidopsis.org) and C. elegans from Wormbase (www.wormbase.org). The genome sequences for O. sativa var. indica and var. japonica was obtained from Genomics (ftp://ftp.genomics.org.cn/; release: 23/04/2008). Supplementary Table 1: Primer sequences and genomes used to generate output for hAT elements. Element ID Pre-Amplification Primer Sequence Selective Amplification Primer Sequence SIMPLEHAT2 CCCTAAACTCATTTGATTAT GTTGAGTTGGGTTACCCATT HATN1_CE ATTTGGATCGCGGCGTGAG GAGCGGCGTTTGAGCGACGC CRATA TGGTGGAGTAACCTCCGACG TCCCCGTTGCCATCTCTA TF000700 TTGTATGGTTGTTTACATTTT GCAATAAAGAGCCGCCAGTT HOBO TTTATCGGGTGGACGTAGAG GGGCTGCAGTTCTCTG Genome Arabidopsis thaliana Caenorhabditis elegans Oryza sativa var. japonica Aedes aegypti Drosophila melanogaster Supplementary Table 2: An Example of Text Output from TE Displayer Lane 2: Database: C:\Users\Becci\Desktop\TE Displayer\aaegypti.fa Enzyme: MseI, TTAA A total of 248 hits of pre_primer sequence. Accession TE_pos Enz_pos Size Sel_base Mismatch AAGE02021692 9106 9231 146 0 AAGE02019341 82445 83329 905 0 AAGE02015032 36361 36631 291 0 AAGE02001634 168360 169044 705 0 AAGE02035910 4355 4551 217 1 AAGE02035655 3094 3152 79 1 AAGE02035583 3669 3773 125 1 AAGE02035169 3977 4088 132 1 AAGE02034801 3075 3291 237 1 AAGE02033496 2122 2358 257 1 AAGE02033409 2038 2112 95 1 AAGE02030860 29081 29152 92 1 AAGE02030445 13517 13732 236 1 AAGE02028058 6008 6162 175 1 AAGE02028020 5019 5129 131 1 AAGE02028003 21522 21597 96 1 AAGE02027559 16053 16100 68 1 AAGE02027227 33794 33869 96 1 AAGE02027010 76660 76721 82 1 AAGE02026563 10170 10293 144 1 AAGE02025719 173385 173460 96 1 AAGE02025668 6938 7176 259 1 AAGE02025638 65632 65866 255 1 AAGE02025458 56334 56439 126 1 AAGE02025430 18464 18518 75 1 AAGE02025241 157097 157155 79 1 AAGE02025058 17789 18186 418 1 AAGE02025002 23434 23595 182 1 AAGE02024088 64381 64501 141 1 AAGE02023582 25461 25534 94 1 AAGE02023311 57119 57452 354 1 AAGE02022738 93274 93795 542 1 AAGE02022381 10020 10276 277 1 AAGE02021989 80090 80157 88 1 Supplementary Figure 1: Screen shot of TE Displayer.