PTPRZ1 and uveal melanoma: Finally, it has recently been shown by using the RNA-chromatin immunoprecipitation assay that the long non-coding RNA (lncRNA) uveal melanoma formation-transcript 1 (OUM1) functions by directly binding to the PTPRZ1 protein in the cytoplasm of uveal melanoma cells, to enhance its TP activity [39], highlighting a novel pathway of PTPRZ1 regulation.