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Twisting ribbons of helices form this glycine receptor, a chloride ion channel built from five subunits arranged around a central pore. Coiled helix bundles drop down through the lower stem where the channel spans the membrane, while the upper part spreads into a dense crown of loops, strands and spirals. Every curl is sculpted as a smooth, open ribbon so the structure reads clearly from any side. A detailed model for biology classrooms studying ion channels, nerve signalling and bioelectricity, and an eye-catching shelf piece for science lovers.

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