Structural diagram of the genomic location, splicing site, derived stop codon, derived poly(A) signal, and derived intron splicing acceptor of each implicated TE. (A) Structural diagram of the 4 TEs (orange bars) located within RARA (light blue) intron 2. (B) Structure diagram of the relative positions of the splicing site (dark red vertical lines), derived stop codon (∗), and derived poly(A) signal (pA) of each implicated TE in RARA-aAPL cases. (C) Structure diagram of the relative genomic locus of LINE-L2a (orange) and RARG (light blue), the insertion of LINE-L2a in RARG intron 9 (upper), and the derived intron splicing acceptor (AG) signal that pairing with the splicing donor signal (GT) of RARG intron 9 (lower). (D) Structure diagram of the relative positions of the derived intron splicing acceptor (AG), splicing site (dark red vertical lines), stop codon (∗), and poly(A) signal (pA) of each involved TE. Orange bars are displayed proportionally according to their length, and the pointed end shows their orientation in the genome, with a scale bar marking 1 kilobase.