This bond breaks, and a new phosphodiester bond is formed (GpA). In the second step, the 3′ OH group of the free 5′ exon attacks the 3′ splice site. The result is joined exons ...

The phosphodiester linkage runs from 5' to 3' on the ribose moiety of adjacent nucleotides. When the message is translated into protein, in which direction is it read?