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Fractionation of a cilium by detergent (NP-40) solubilization of the membrane plus matrix, followed by the thermal depolymerization of most of the tubulin from the 9+2 axoneme, yields a ninefold remnant that retains most of the architectural proteins and a vane-like segment of the A-tubule. For spatial orientation, a partially depolymerized A-tubule is shown on the remnant. [Based on results of Stephens et al. (1989).]
