(a)–(e) plot the simulation results with constant free dimer concentration and (f) plots the results with constant total dimers. (a) Percentage of ribbon structures v.s. time for different values of

(

as labeled in the figure with corresponding circled numbers). (b) Probability of finding neighboring

*tube*-

*sheet* (T-S) structures as a function of time (

as labeled in the figure with circled number). (c) Percentage of T-S structures v.s. time for structures with 3 PFs (solid line) and structures with 4 or more PFs (dashed line). (d) Average PF lengths of assembly structures v.s. time with number of PF = 1, 2, 3, 4, 5, and 6, respectively (for

). (e) Occurrence of different size clusters v.s. time with numbers of PF = 1, 2, 3, 4, 5 and 6, respectively (

for all). (f) Percentage of T-S structures v.s. time for variable

(

, as labeled in the figure with corresponding circled numbers) with a constant number of total tubulin dimers of 100.

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