| HGT | Horizontal gene transfer |
| LGT | Lateral gene transfer |
| HR | Homologous recombination |
| ICEs | Integrative and conjugative elements |
| MGEs | Mobile genetic elements |
| SSB | Single-stranded DNA-binding protein |
| SCCmec | Staphylococcal cassette chromosome element |
| AICEs | Actinomycete integrative and conjugative elements |
| SI | Symbiotic island |
| GTAs | Gene transfer agents |
| GIs | Genomic islands |