Figure 4.
Time series of conditioning, memory erase and conditioning again. White regions are the non-conditioned regions; the cells are only able to express the GFP molecule under X signalling. The green regions are regions where the system is being conditioned, there is the association process, simultaneous stimulation with X and Y . Orange regions, the system is conditioned; it is able to respond to the unconditioned stimulus and to the conditioned. When there is a pulse of IPTG (cyan area), there is a loss of memory, a disassociation between signals. The parameters are the same as in the previous figure and βIPTG = 0.04 and the IPTG pulse is 1 μM of amplitude. (Online version in colour.)