SMOX and infection: Nevertheless, there was still a difference between wild-type PAO1 and PAO1ΔexoSTY in rates of HeLa cell membrane permeabilization, albeit less striking than for corneal cells, with significantly longer survival over 20 h of observation post-infection for wild-type infected cells; mean (with SD) time of cell death was 10.2 ± 1.3 h for PAO1ΔexoSTY versus 13.0 ± 1.3 h for PAO1 (Fig 1D).