Fig. 2. Saccharomyces cerevisiae (fungus). erg6 cells are insensitive to decanal and 4Z-decenal but are highly sensitive to 2E,4E-decadienal and 2E-decenal, as indicated by the growth inhibition halo around the filter where these molecules were spotted. Concentration of each aldehyde tested was 9.1 µg disk^-1. ERG6wt cells (wild-type strain) are not sensitive to any of these molecules.