A segment of DNA that is capable of moving to a new position within the same or another chromosome, plasmid, or cell and thereby transferring genetic properties such as resistance to antibiotics.

• 转位子一种脱氧核糖核酸片断，它能够移到同一个或另一个染色体、质体或细胞上的新位置，并转录各种基因的特性，如对抗菌体的抵抗力