TRIM28 and prostate neoplasm: Whereas Trim28 deletion in NPp53 prostate tumors primarily affected ERV elements (Fig. 1D), comparison of NPp53 to NP prostate tumors revealed differential expression of many transposable element subfamilies from classes including long interspersed nuclear elements (LINEs), short interspersed nuclear elements (SINEs), and DNA elements (Fig. S2I-K).