Structures of plasmids p12 (GenBank accession no. FJ223605), pBK13048_KPC14 (accession no. CP045022), and pKm38_N (accession no. KY128483). Colored arrows indicate open reading frames, with blue, orange, green, red, and purple arrows representing replication genes, plasmid backbone genes, mobile elements, plasmid transfer genes, and antimicrobial and heavy metal resistance genes, respectively. Blue shading indicates regions of shared homology among different elements.