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Table 1 Agglutination assay results between APN and F4 + E. coli

From: Porcine aminopeptidase N binds to F4+ enterotoxigenic Escherichia coli fimbriae

Bacterial Strain Agglutination with APNa
F4ab +++
rF4ab ++++
F4abΔfaeG +/−
F4ac +++
rF4ac ++++
F4acΔfaeG +/−
F4ad ++
rF4ad +++
F4adΔfaeG +/−
SE5000
DH5α
  1. a++++ = nearly 100% agglutination; +++ = turbid background with intermediate agglutination; ++ = obvious but not strong agglutination; +/− = insignificant agglutination; − = no agglutination.