General properties of the six categories of Haloquadratum MGEs.

aCanonical transposons (TP-B), and A-/B-type Small Mobile Repeats (SMR) show a high sequence conservation between elements classified into the same type (commonly >95% sequence identity). PATEs and IS605-type transposons are much more divergent, except for a few types of homogeneous PATEs. MGE types classified into the same family show sequence homology of the element itself or of the encoded transposase. The total number of elements and the number of SSEIs (total/SSEI) is given for strains C23T and HBSQ001. For TP-A and PATE, a distinction is made between SSEIs of complete elements (first value) and SSEIs of terminal-only elements that have suffered core deletions (second value in parenthesis, prefixed with a plus sign). Terminal-only TP-As have lost their transposase genes and so have degenerated to PATEs.