Reactivity of rabbit sera obtained from immunization with <i>N</i>. <i>gonorrhoeae</i> NgoΦfil phage proteins.

Phage particles were separated on SDS-PAGE gels and subjected to Western blot analysis. Lanes 2 and 4, extracts were derived from broth-grown gonococci. In lanes 1 and 3, extracts were from purified phage. Lanes 1 and 2 were incubated with day 28 sera. Lanes 3 and 4 were incubated with pre-immunized rabbit sera. (For original Western blot, see S4 Fig and S5 Fig).