mRNA Workshop
Turn pre-mRNA into mature mRNA before nucleases destroy it. Swipe across grey introns to cut them out (exons join automatically; never tap an exon), tap the 5′ end to add the cap, and tap the 3′ end three times for the poly-A tail. Then it exits to the cytoplasm!
Press and drag to swipe-cut introns (mouse cursor moves extra fast), or tap. In alternative splicing, exons marked SKIP are removed too.