Figure 4From: Engineering Escherichia coli K12 MG1655 to use starch Qualitative secreted amylase activity. Lugol-staining of M9 plus starch plates where WT, WTa6, Amy0, Amy6, and Bacillus megaterium were cultured. Stained plates indicate no starch degradation. Clear plates indicate starch degradation by the amylase.Back to article page