They contain at least one copy of IS 1222, IS 1271 or Tn5, which might eventually be responsible for the integration of pEA9 DNA in chromosomal DNA of Entherobacter agglomerans .

• 转座子Tn5或插入序列IS 12 2 2和IS 12 71可能参与质粒与染色体的整合过程 .