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Phases of MPS development along the growing axon. Schematic drawing of the phases of MPS development along the growing axon, the growth cone is to the left. The dotted lines mark 10 µm intervals. βII-Spectrin molecules form periodic patches (symbolized by small green circles) close to the growth cone (assembly phase). These patches then increase in number and size (elongation phase), coalesce during maturation, and form the final MPS (coalescence phase).
