CASP3 and infection: A second gastric cell line, KATOIII, was more sensitive to Hp-induced apoptosis: caspase-3-positive cells were detectable upon infection at an MOI of 30 (Fig. 2f), with a trend to small amounts of DEVD-cleaving activity at MOI = 10 (Fig. 2g), where no caspase-3-positive cells were detected (Fig. 2f) and other measurements of cell death were negative (Fig. 2h, i).