Fig 2.
Effects of two different sialic acids on expression of reporter lacZ transcriptional or translational reporter fusions to nanA (strain 12-1), nanS (strain EV741), or yjhC (strains EV742 and EV743). The indicated bacterial strains were grown in glycerol minimal medium or medium supplemented with 100 μg/ml Neu5Ac or Neu5,9Ac2 for 1 h and assayed for reporter β-galactosidase activity. The results are the averages from three independent experiments; error bars show standard deviations (SD). A lack of visible error bars means that the SD was less than the width of the bar outline.