Fig. 2.

Interactions of Min proteins from E. coli and B. subtilis. E. coli strain BTH101 (Δcya) was co-transformed with plasmids containing the indicated fusions of E. coli and B. subtilis min genes and divIVA to adenylate cyclase fragments T18 and T25. (a) Colonies spotted onto selective X-Gal plates indicate positive (blue) and negative (white) interactions, respectively. (b) The strength of each interaction was quantified by β-galactosidase assay. Numbers indicate Miller units of activity and represent the mean±sd of activity from at least three measurements. Positive interactions are marked by a range of blue colours, as indicated in the key.