Here, three colorectal tumors were subjected to anti-ORF1p LFQ, IP-MS: (A) Krukenberg Carcinoma, Ovary; (B) Metastatic Rectal Adenocarcinoma, Liver; (C) Adenocarcinoma, Colon. These were accompanied by matched normal IP controls and/or mouse IgG IP controls. The objective is to map LINE-1 RNP interactions in cancer.