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Gel electrophoresis of plasmids isolated from avian and human E. coli isolates. Lanes 1, A7, Lane 2, A17, Lane 3, A28, Lane 4, A30, Lane 5, H57, Lane 6, H60, Lanes 7, H61; Lane 8, H78; Lanes 9 and 10, blank; Lane 11, Plasmid markers, pUC4K (3.9 kb), pTYB11 (7.4 kb) and pHS1 (12 kb).
