1. The PC itself is composed of a microtubule-based core structure named the Axoneme, which nucleates from a basal body and is surrounded by a ciliary membrane, which is continuous with the plasmatic membrane (Figure 1).

2. Crystallization is a method for transforming a solution into a solid, where a supersaturated solution nucleates the solute by a chemical equilibrium controlled process. Uniform particles with well-defined morphology are formed, and these readily re-dissolve