Richard hypothesis 

d/w = resource separation ratio.

d/w < 1, species cannot coexist;

1 < d/w < 3, there will be some competition between species

d/w > 3, species coexist harmoniously

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The two ends of microfilament polymerize at different rates:

fast-growing end - plus end

slow-growing end - minus end

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Critical concentration (Cc)

minimal concentration of monomers at which filaments form

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The rate of addition of monomers is given by

rate constant kon (M–1 sec–1 )

The rate of loss is given by koff (sec–1)

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Steady-state phase

G-actin monomers exchange with subunits at the filament ends, but there is no net change in the total length of filaments.