Immunoprecipitation of both p32 and XRN2 in 92.1 and OMM1 cells revealed a 2- and 6-fold enrichment in OMM1 and a 4- and 64-fold enrichment in 92.1 of SAMMSON RNA, respectively, indicating that SAMMSON binding to these factors is conserved in uveal melanoma cells (Fig. 3A and Supplemental Fig. 5A). This evidence concerns the gene C1QBP and uveal melanoma.