Stationary configuration of MTs with (A) no motors, (B) dimeric motors, and (C) tetrameric motors within circular confinement for two attraction energies, EA = 0.2 kBT and 1.0 kBT. Number of motors is equal to the number of MTs for the four cases with motors, i.e., Nm/Nf = 1. Colors of MT represent their orientation with respect to the radial direction from the center. Small black dots represent the position of each motor-arm on MTs. For EA = 0.2 kBT; (A), (B), and (C) correspond to Movies S1, S2, and S4, respectively. To see this figure in color, go online.