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Epistasis analysis of ΔcheY7, Δdes7, and Δcpc7 strains. cheY7 was expressed from the Mx8 phage attachment site (see text) in various mutant backgrounds and assayed for defects in development. Cells were plated on CFL starvation agar and assessed for aggregation. The cpc7 mutation is epistatic to the mutation in cheY7 and could not be complemented by expression of cheY7 in the absence of cpc7.
