Fig 4.

Dot blot hybridization of a proteinase K extract from Helicobacter bizzozeronii strains untreated (line 1) or treated with neuraminidase from Clostridium perfringens (line 2). Dot blotting was done by using peroxidase-conjugated cholera toxin subunit B (A) and anti-sialyl-Lewis X antibodies (B).