NapA protects Helicobacter pylori from oxidative stress damage, and its production is influenced by the ferric uptake regulator, by C. Cooksley, P. J. Jenks, A. Green, A. Cockayne, R. P. H. Logan & K. R. Hardie
Journal of Medical Microbiology vol. 52, part 6, pp. 461 - 469
Fig. 5 (colour version). NapA co-localizes with cellular DNA. E. coli BL21(DE3) harbouring either pCC2 (bearing napA) [a-c, g (lane +)] or the empty plasmid vector pET3a [d-f, g (lane )] were grown for 8 h in LB broth containing 1 mM IPTG at 30 °C with shaking and the production of rNapA by the former was verified by analysis of whole-cell extracts subjected to Coomassie-stained SDS-PAGE (g) and Western blot analysis (data not shown). Cells were stained with DAPI and probed with FITC-conjugated anti-NapA antiserum according to Methods. Microscopy was then performed to visualize the cells by phase-contrast (a, d) and DAPI under UV (b, e) and FITC with a blue filter (c, f). Representative images from three separate experiments are shown. In (g), molecular masses of markers are shown in kDa and the position of rNapA is indicated by the arrow.
