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Robust Signal Processing in Living Cells
Figure 3
The E. coli chemotaxis pathway.
(A) A pathway diagram and (B) the organization of its constitutive genes into two operons, denoted as 
and 
. (C) To a good approximation, the pathway can be described by three variables: the average methylation state 
, the concentration of phosphorylated methylesterases CheB (
) and the concentration of phosphorylated response regulator protein CheY (
). See Materials and Methods for definitions and equations.
doi: https://doi.org/10.1371/journal.pcbi.1002218.g003