A recent study demonstrated that a transposase (Tnp) of Acinetobacter baumanii was targeted to the nuclei of A549 (a human lung carcinoma) and COS-7 (African green monkey kidney) cell lines, and that this resulted in specific CpG methylation of the CDH1 (E-cadherin) promoter (Moon et al., 2012). Here, CDH1 is linked to lung carcinoma.