FIG. 5.

GNA3 is required for peptaibol production by H. atroviridis. H. atroviridis P1, and its Δgna3 mutant were used. Other symbols are used as explained in Fig. 4. Only experiments performed with illuminated cultures are shown since none of the nonilluminated cultures of the delta-gna3 mutant showed any peptaibol production. The range of intensity is 0 to 18,000 to make the traces of peptaibols which are still formed more visible. The experiment shown is typical for three independent experiments, whose results were consistent with the data shown here.