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Agarose (1%) gel stained with ethidium bromide showing the PCR product amplified with the eap and map primers P2 and P3 from genomic DNA of S. aureus as described in Methods and Materials. Lanes: Mr, DNA molecular size marker (combined 100-bp and 1-kb DNA ladder [New England Biolabs]); 1, S. epidermidis DSM 20044; 2, S. aureus clinical isolate 7 (1.8 kb); 3, S. aureus Newman (2.0 kb); 4, S. aureus Wood 46 corresponding to group III (2.4 kb).
