Classification of the Observed CDS Splits
| cDNA group | Nonsense mutation | Insertion (GT-AG)[i] | Deletion (GT-AG)[i] | Frame-shift mutation | None[ii] | Others[iii] | Total |
| KG1/NFL | 0 | 3 (0) | 6 (2) | 11 | 10 | 1 | 31 |
| Brain/Ch1 | 0 | 4 (4) | 1 (0) | 1 | 3 | 1 | 10 |
| Brain/LCDS | 3 | 31 (19) | 10 (2) | 18 | 20 | 8 | 90 |
| Total | 3 | 38 (23) | 17 (4) | 30 | 33 | 10 | 131 |
[i] Numbers in parentheses are the numbers of insertions or deletions having possible GT-AG splicing boundaries.
[ii] Number of cloned cDNA sequences were identical to those of the main RT-PCR products at the site triggering an alert by GeneMark analysis.
[iii] Number of the sites including multiple causes for single CDS splits.
[iv] Note: numbers of experimentally examined sites are given in each cDNA class. KIAA0302 and KIAA0324 were omitted from these data because they were found to contain sequencing errors.