(A) IFNγ primed WT, Irgm2-/-, Casp11-/- and Irgm2-/- Casp11-/- BMMs were treated with LPS (5 µg/ml) for 4 h. Following treatment, cells were stained with anti-ASC antibody and Hoechst (DNA/nuclei). Representative images of ASC specks (white arrows point at specks) are shown and number of ASC specks per nuclei quantified. Scale bars: 20 µm. 