Immunohistochemistry of the RSL1D1 protein. (A) Negative control. (B-E) Representative images of RSL1D1 expression in PCA tissues with (B) grade I, (C) grade II, (D) grade III and (E) grade IV staining. (F) RSL1D1 in the mesenchyme of PCA tissues. (G) RSL1D1 light staining in benign prostate tissue. Magnification, x200. RSL1D1, ribosomal L1 domain containing 1; PCA, prostate cancer.