From: Sequence features responsible for intron retention in human
 |  | introns | exons | |||
---|---|---|---|---|---|---|
 | cis-regulatory motif | retained | non-retained | flanking upstream | flanking downstream | all other |
 | SF2/ASF | 0.0415 +i | 0.0365 | 0.0458 | 0.0451 | 0.0430 |
 | SC35 | 0.0457+i | 0.0413 | 0.0445 | 0.0450 | 0.0425 |
 | SRp40 | 0.0388 | 0.0384 | 0.0399 | 0.0395 | 0.0394 |
low | SRp55 | 0.0219 | 0.0220 | 0.0272 | 0.0264 | 0.0261 |
 | RESCUE-ESEs | 0.0442 -i | 0.0541 | 0.0837 | 0.0850 | 0.0951 |
 | GAA (ESE) | 0.0115 -i | 0.0142 | 0.0191 | 0.0197 | 0.0219 |
 | GGG (ISE) | 0.0397 +i | 0.0333 | 0.0185 | 0.0190 | 0.0165 |
 | FAS-ESS hex-3 class 1 | 0.0047 -i | 0.0069 | 0.0010 | 0.0009 | 0.0011 |
 | FAS-ESS hex-3 class 2 | 0.0294 +i | 0.0276 | 0.0110 | 0.0115 | 0.0101 |
 | SF2/ASF | 0.0383 +i | 0.0345 | 0.0445 | 0.0458 | 0.0423 |
 | SC35 | 0.0409 | 0.0387 | 0.0447 | 0.0412 | 0.0428 |
 | SRp40 | 0.0394+i | 0.0371 | 0.0404 | 0.0397 | 0.0408 |
high | SRp55 | 0.0231 | 0.0219 | 0.0256 | 0.0241 | 0.0250 |
 | RESCUE-ESEs | 0.0548 | 0.0591 | 0.0952 | 0.0971 | 0.0974 |
 | GAA (ESE) | 0.0137 -i | 0.0156 | 0.0227 | 0.0206 | 0.0224 |
 | GGG (ISE) | 0.0264 -i | 0.0300 | 0.0164 | 0.0173 | 0.0165 |
 | FAS-ESS hex-3 class 1 | 0.0043 -i | 0.0074 | 0.0017 | 0.0007 | 0.0013 |
 | FAS-ESS hex-3 class 2 | 0.0208 -i | 0.0253 | 0.0095 | 0.0106 | 0.0098 |