IMMT and cancer: In order to test if NO generation by SL7838 contributes to its lethality to cancer cells, we generated strain SL7842, which was rendered more active in NO generation by deleting the norV and hmp genes that encode the pathways for decomposing this radical; while SL7838 cell suspensions caused complete disappearance of added NO (90 μM) within ca. 200 min (as measured by Greiss assay), those of SL7842 generated no decomposition; the NO donor, DEA NONOate, was used in these experiments.