Figure 1.

Inter-AG lengths in known splicing and coding regions. Inter-AG distances in known coding and trans-splicing regions show different distributions. The distance between AG dinucleotides is significantly greater in known trans-splicing regions than in known coding regions. Distances are shown for 214 known trans-splicing regions and 198 coding regions. The mean inter-AG distance for the coding region data is 42 nucleotides, compared with a mean inter-AG distance of 81 nucleotides for known trans-splicing regions.