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Immunohistochemical staining of guanyl nucleotide-releasing protein for Ras 3 (RasGRP3) protein in prostate tissues. (a) RasGRP3 staining was negative in benign prostatic epithelia. (b, c, d) Representative positive staining of RasGRP3 in low-risk, intermediate-risk and high-risk prostate cancer. Low magnification is × 20; high magnification (inset) is × 40.
