Table 1.

Transposon Tn21 and the mobile elements it contains

ElementCoordinatesSize (bp)
Tn21 1–1967119,671
aadA1cassetteb 5395–6250856
IS1326 8276–10719, 12333–12360c 2,470
IS1353 10720–123321,612
  • a Duplication of 5 bp due to insertion of In2; coordinates 4035 to 4039 and 15039 to 15543.

  • b The cassette is located within In2 but is independently mobile.

  • c The sequence of IS1326 is interrupted by the insertion of IS1353, which creates a 2-bp target site duplication.