FIGURE 4.
3′ and 5′ UTR termini derived from populations of circularized molecules. Replicate experiments have been pooled by first normalizing for tail counts, so average density for each nucleotide is shown. Black represents the termini with occurrence probability >0.01%, with the size of the nucleotide corresponding to its frequency as a terminus. The gray nucleotides represent positions with probabilities between 0.1% and zero that exist between nucleotide positions that are more frequently termini. Other nucleotides that are termini with a probability <0.1% are not shown.
