What is the primary role of the protein 'vimentin' in the context of cell junctions in non-epithelial cells?
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Correct answer: It anchors desmosomes in mesenchymal cells.
While epithelial cells use keratin, mesenchymal cells (like fibroblasts) use vimentin as their intermediate filament. Vimentin provides the structural scaffold to which desmosome-like junctions attach in these cell types.
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