Immunocytochemistry staining of PCNA in PHA-stimulated lymphocytes using Anti-PCNA Antibody [PC10] (A86878), (diluted 1:400), detected with GAM IgG-Alexa Fluor®488 (diluted 1:200); DNA stained with propidium iodide. Colocalization of green PCNA signal and red DNA signal indicated as yellow.