Agarose gel electrophoresis showing PCR-RFLP patterns of the 643-bp amplified ccrB gene fragment from reference MRSA strains of four SCCmec types digested by HinfI (left) and by HinfI and BsmI (right). Lanes: 1, HPV107; 2, NCTC10442; 3, BK2464; 4, N315; 5, ANS46; 6, 85/2082; 7, MW2; 8, JCSC4044; M, 100-bp ladder marker.