Behavior of coexisting S. cerevisiae and E. coli cells. When the two species are placed together, obligatory mutualism is observed, i.e they benefit from each other and survive from Gc. The inset represents part of Figure 2B and shows the fluctuations of E. coli population size.
Biliouris et al. BMC Systems Biology 2012 6:58 doi:10.1186/1752-0509-6-58