FIG. 2.

Self-organized microtubule patterns. Left, forms. (a) Multimeric kinesin only. (Adapted from Surrey et al. [152] with permission of the publisher.) (b) Multimeric kinesin plus a multimeric Drosophila motor protein. (Adapted from Surrey et al. [152] with permission of the publisher.) (c) Modified kinesin in a toroidal chamber. (Adapted from Nèdèlec et al. [118] with permission of the publisher.) Right, mechanisms. (d) A minus-directed motor (dynein) points the plus ends outward. (Adapted from Karsenti and Vernos [81] with permission of the publisher.) (e) A plus-directed motor (kinesin) points the minus ends outward. (Adapted from Karsenti and Vernos [81] with permission of the publisher.)