YopE inhibits amoebial growth. Vegetative growth was measured in liquid cultures of cell lines with non-induced and induced expression of YopE, GFP-YopE, YopH, GFP-YopH, GFP-YopJ and GFP-YopM. Black squares: non-induced cell lines; grey circles: induced cell lines. For each growth curve, two independent cultures, each run in duplicate, were analyzed and averaged. Standard error bars are mostly smaller than symbol sizes.