Rabbit Kidney Epithelial Cells (RK13 Line)
Similar to other epithelial cells, RK13 cells stain positive for the protein keratin. In most epithelial cells, the keratin cytoskeleton extends throughout the cytoplasm from the surface of the nucleus to the periphery of the cell. At the periphery, the keratin cytoskeleton interacts with desmosomes and hemidesmosomes. Extremely stable, filaments of keratin provide significant structural strength to epithelial cells and the sheets they naturally have a tendency to form.