PTPRD and prostate cancer: In FBAT models, for prostate cancer SNP rs255561 (rank 17, p = 0.00039), is near XRCC4, a gene that plays a role in DNA repair and rs1897676 (rank 50, p = 0.0012), is in PTPRD. Protein tyrosine phosphatases are signaling molecules involved in the regulation of a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation [13].