FIG. 2.

Effects of IFN-γ-induced persistence on C. pneumoniae protein expression. HEp-2 cells were infected with C. pneumoniae A-03 and incubated for 24 h in the absence or presence of 50 U of IFN-γ per ml. Chlamydial proteins were labeled for 2 h with [³⁵S]methionine/cysteine, and 2D electrophoresis was performed as described in the text. Panels A and B coincide with the boxed regions shown in Fig. 1.