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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Curr Opin Genet Dev. 2020 Dec 5;67:67–76. doi: 10.1016/j.gde.2020.11.002

Figure 1:

Figure 1:

A variety of potential products can be derived from synthesis and processing of a single pre-mRNA, including post-transcriptional RNAs with retained introns. Introns are depicted as thinner black bars spaced between the thicker, colored exons. Co-transcriptional RNAs are elongating, depicted by rightward-facing arrows whereas post-transcriptional RNAs have been cleaved and polyadenylated. Retained introns are often flanked by alternatively spliced exons (orange) compared to constitutively spliced exons (blue).