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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Circ Cardiovasc Genet. 2015 Jan 5;8(1):216–242. doi: 10.1161/HCG.0000000000000020

Figure 3.

Figure 3

The structure of a gene and its transcription into an mRNA. Genes have exons and introns. The exons are coding sequences (with the exception of 2 noncoding elements at the beginning and end of the gene called 5′ untranslated region [UTR] and 3′ UTR, the significance which is beyond the scope of this document). The introns are noncoding sequences. Transcription enzymes, starting at the noncoding promoter, produce an RNA transcript from the DNA gene. This RNA transcript is processed by splicing factors to remove the introns (and a “poly(A) tail” is added, the significance of which is beyond the scope of this document).