Lipid A analysis from <i>Y. enterocolitica</i> lipid A mutants.

<p>Negative ion MALDI-TOF mass spectrometry spectra of lipid A isolated from the indicated <i>Y. enterocolitica</i> strains grown at 21°C (A,C,E) and 37°C (B,D,F). The results in all panels are representative of three independent lipid A extractions. (G) Analysis of the expression of <i>lpxR</i> by measuring luciferase activity of YeO8 (white bars) and YeO8-Δ<i>pmrF</i> (gray bars) carrying <i>lpxR::lucFF</i> transcriptional fusion, which were grown at 21°C or 37°C. Data are presented as mean ± SD (n = 3).