Table III. Classification of unspliced intragenic nEPTs.

Each nEPT location was classified by visual inspection of mapped EPT on the genome alongside the published gene models, six reading frame translations, and RNA-Seq read alignments using IGV. EPTs were grouped into common categories based on the most likely type of addition or correction suggested.

Category	Count
Other splice fix	115
Missing gene end	99
Splice fix at 3′ exon	86
Insertion/deletion	56
Different strand/frame	53
Alternative splicing	18
Retained intron	15
Gene fusion correction	11
Alternate start codon	11
Noncanonical start codon	7
Other/unexplained	33
Total:	504