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Mid-stride on a tubulin microtubule, this kinesin motor protein shows how cells haul cargo along their internal highways. Two knobbly heads plant on the rows of rounded tubulin beads, a twisted coiled stalk rises from them, and a clustered cargo tail tops the climb. The rope-like stalk and bumpy textures give the piece real character and a clear sense of motion. A favourite for a cell biology classroom, a molecular biology student's desk or a science shelf next to other protein models.

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