FIG. 1.

The activation of caspase 3 in LPS-stimulated RAW cells and the inhibition by Z-VAD-FMK or DEVD-FMK. (A) RAW cells were treated with LPS (1 μg/ml) for various amounts of time. (B) RAW cells were pretreated with Z-VAD-FMK (100 μM) or DEVD-FMK (10 μM) for 30 min. Both pretreated and untreated cells were exposed to LPS (1 μg/ml) for 1 h.