PEBP1P2 and nonpapillary renal cell carcinoma: To uncover the role of PEBP1P2 deficiency in ccRCC metastasis, we silenced PEBP1P2 in cells using shRNAs or antisense oligonucleotides, and overexpressed it using a Synergistic activation mediator (SAM) system or lentivirus vectors (Additional file 1: Fig. S3).