The E. coli TRN is flexible in response to changing environmental conditions encountered. Changing the environmental condition can lead to a wide range of hamming distances among the attractors. In the figure, the distribution of pair-wise hamming distances between attractors for 15,427 different environmental conditions is shown. Inset: Enlargement of the graph for large hamming distances. The largest hamming distance obtained between attractors for two different environmental conditions is 145.