RANGAP1 and gastric cancer: Consistent with circRNA microarray data (Figs. S1A–C), the high abundance of circTFRC was further confirmed in GC cells, exceeding the expression levels of other reported upregulated circRNAs in GC, including circURI1 (Arraystar ID: hsa_circRNA_102503) [29], circNRIP1 (Arraystar ID: hsa_circRNA_103110) [30], circ-RanGAP1 (Arraystar ID: hsa_circRNA_103237) [31], hsa_circ_0088300 (Arraystar ID: hsa_circRNA_104902) [32], and hsa_circ_0007376 (Arraystar ID: hsa_circRNA_102415) [33] (Figs. S1E, F).