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PvuII ribotypes of Salmonella enteritidis. Lanes 2 to 16, R1 to R15; digoxigenin-labelled DNA molecular size markers III (21, 5.2, 5.0, 4.3, 3.5, 2.0, 1.9, and 1.6 kb) and VII (8.0, 7.1, 6.0, 4.8, 3.5, 2.7, 1.9, 1.8, and 1.5 kb) (both from Boehringer) are used in lanes 1 and 17 and lane 18, respectively.
