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Southern blot of E. faecalis with the PCR products of orfde4 to orfde10 of the epa gene cluster of OG1RF. Lanes: 1, TX0043; 2, TX0045; 3, TX0048; 4, TX0630; 5, TX0635; 6, TX0645; 7, TX0668; 8, TX0771; 9, TX0860; 10, TX2486; 11, TX2783; 12, TX4000.