Shown below is a schematic drawing of a gene, with the transcription unit divide

Question

Shown below is a schematic drawing of a gene, with the transcription unit divided into numbered regions. The arrows (r^+) indicate transcription initiation sites, "D" indicates a splice donor site, "A" indicates a splice acceptor site, and "A_n" indicates a polyadenylation signal. Assuming that region 6 contains an intron that must be removed, please indicate all the possible mRNAs that could be produced from this gene (you don't need to draw new schematics - just list the regions that would be included m each mRNA by number).

Explanation / Answer

The following mRNA would form:

1+2+3+4+5+7+8

2+3+4+5+7+8

3+4+5+7+8

4+5+7+8

2+3+7+8

5+7+8

1+7+8;

4+7+8;

5+7+8

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