TABLE 2:

Types of experiments/simulations.

Type of experiment/simulation	Description
Competing	Closed system where [total tubulin] is held constant for the duration of the experiment and MTs compete for tubulin (e.g., in a test tube)
Noncompeting	Open system where [free tubulin] is held constant for the duration of the experiment (e.g., in a flow cell)
Dilution	System where MTs are grown to polymer-mass steady state under competing conditions at very high [total tubulin] and then moved into noncompeting conditions at various values of [free tubulin]