Fig. 6.
Example of tests of mutants obtained by site-directed mutagenesis of minD. Spot tests were used to determine if MinD mutants activated MinC (no growth in the absence of MinE). Mutants, such as MinD-D93R activated MinC and responded to MinE, whereas MinD-K94D did not activate MinC. To see if MinD-K94D interacts with MinE it was tested in the bacterial 2-hybrid system (minD alleles are shown to the right of the test strip). If, like minD-K94D, they did not interact with minE, they were tested for self-interaction (minD-K94D and minD-V161E did self-interact whereas minD-D159R did not). Results for all mutants are summarized in Table 1 of the supporting information.