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Alternative splicing can produce different mRNA transcripts from the same gene. In this figure, gray boxes with numbers are exons, and boxes with diagonal lines are introns. The circle represents the mRNA 5′ cap, and (A)n represents the poly(A) tail. DNA is transcribed into pre-mRNA that can then be spliced differently to produce transcripts of different lengths and sequence composition. Alternative splicing is indicated next to the different splice variants.
