Statistical Physics
"More
is different," P.W. Anderson, Science 177,
393 (1972)
"The
chemical basis of morphogenesis," A.M.
Turing, Phil. Trans. Roy. Soc. 237,
37 (1952)
(inhibitors and activators with different diffusion rates)
Less
can also be different:
"Purely stochastic binary dicisions in cell signaling models ... ,"
M.N. Artymov, J. Das, M.K., and Arup K. Chakraborty, PNAS 104, 18958 (2007)