FIG. 4.
Expression of OmpA by the different R. anatipestifer serotypes. Immunoblots of total cell lysates of the R. anatipestifer type strain and the different serotype reference strains reacted with monospecific polyclonal anti-OmpA-His6 mouse serum are shown. The numbers indicate the serotype (Table 1) a, strain CCUG 25055 890822; b, strain DRL 28020. C, purified recombinant His6-OmpA1His10 used as a control; st, prestained broad-range protein markers (New England Biolabs). Molecular masses of the protein markers are given in kilodaltons.