The integron encodes a site-specific recombinase(IntI) responsible for the insertion of gene cassettes at attI, and also provides the promoter responsible for expression of the cassette-encoded genes.

• 整合子是一种遗传因素,编码一个位点特异重组酶(IntI)负责基因盒在 attI位点的插入,同时整合子也提供一个启动子(Pant)负责基因盒耐药基因的表达。