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Conserved domain in the IS66 transposase ORFs. Asterisks mark positively selected amino acids corresponding to codons 128 and 184. The other two positively selected codons are not within the conserved domain. Numbers in brackets indicate the number of amino acids in length-variable regions. The sequence marked 679213 is an IS66 transposase gene copy from contig 360; the other sequences are from the conserved domain transposase_25.
