Fig. 1From: Circular RNAs in cancer: an emerging key playerCanonical and noncanonical splicing of circRNA. a mRNA and ciRNA by canonical splicing. b circRNA by direct back splicing. c ciRNA by back splicing. d circRNA and EIciRNA by RBP-driven circularization. Abbreviations: ciRNA circular intronic RNA, circRNA exonic circular RNA, ElciRNA exon-intron circular RNA, RBP RNA-binding proteinBack to article page