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Immunoblot of outer membrane proteins probed with anti-FyuA rabbit serum. Lane 1, Y. enterocolitica O8 WA-C; lane 2, E. coli 14094/96 from blood culture (HPI positive); lane 3, EAEC 17-2 (HPI positive); and lane 4, EAEC 4827/94 (HPI negative).
