COPG1 and nonpapillary renal cell carcinoma: Moreover, we evaluated expression of FERMT2, FERMT1, COPG1, and COPG2 in the KIRC cohort through the GEPIA2 website (data not shown) and found that the median expression values of FERMT2 and COPG1 were higher than those of FERMT1 and COPG2, but the detailed relationships and prognostic values of these paralogs in ccRCC patients need further exploration.