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Indirect immunofluorescence localization of α and β isoforms of Na+, K+-ATPase in human chondrocyte-like cells attached to poly-l-lysine coated slides. Cells were probed with α and β isoform specific antibodies and secondary Fluorescein-conjugated IgG. Nuclei were counterstained red with propidium iodide. Bar indicates 10 μm.
