Organization of vanA operons (E. faecium B4147, accession no. M97297), vanB (E. faecalis V583, accession no. U35369), vanF (P. popilliae ATCC 14706, accession no. AF155139), vanAPT (P. thiaminolyticus PT-2B1, accession no. DQ018710), and vanAPA (P. apiarius PA-B2B, accession no. DQ018711). For every gene, identity to the corresponding gene of the vanA operon in Tn1546 and the GC content are indicated above and below the gene, respectively. Arrows indicate extent of the genes and direction of transcription.