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'Inexact' phase differences that may take any value in the range [0,π], between the chemical morphogens diffusing in an embryo, have been proposed [M.A. Russell, Dev. Biol. 108 (1985) 269] to improve the positional information theory [L. Wolpert, J. Theor. Biol. 25 (1969) 1] by encoding this information with higher resolution than that provided by other mechanisms. Reaction-diffusion systems, including...
When an activator-inhibitor system switches from a spatially uniform to a patterned state by a differential transport instability - the differential flow instability, or the diffusive or Turing instability - the values of variables, such as concentrations or reaction rates, including their averages, may drastically change. Analysis shows that such control of productivity by differential transport...
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