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Microtubules, one of the primary components of the cell’s cytoskeleton, are made from polymerized tubulin (a protein which may be able to intrinsically facilitate the flow of electrons via semiconduction). Several theories of microtubule conductance have been proposed, ranging from ionic conductivity along the outer ring, intrinsic conductivity via tubulin bands, and proton jump conduction through the inner portion of the microtubule.
The authors of one paper concluded:
“considering their semiconductor and machine-like properties, microtubules may be used as basic materials to build molecular electronic devices. Microtubules appear to possess a crystal symmetry-based code system which may be used in biological and future technological computing.”
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