To investigate whether circRNF19A affects the subcellular localization of HNRNPF, we tested the expression of HNRNPF in total protein and nuclear protein samples from PCa cells transfected with control vectors, circRNF19A-Flag, circRNF19A-IRES-mut or linear RNF19A-490aa. This evidence concerns the gene RNF19A and posterior cortical atrophy.