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The amino acid differences between CTD region 1 and the S1TD mutant are shown in bold underline.
| Region | Residues | Sequence |
|---|---|---|
| 4 | 171–194 | SKPKKAKTVKPKAKSSAKRASKKK |
| 3 | 147–170 | KKKPAATPKKAKKPKVVKVKPVKA |
| 2 | 123–146 | AAKPKKAASKAPSKKPKATPVKKA |
| 1 | 98–122 | GDEPKRSVAFKKTKKEVKKVATPKK |
| RanS1#1 | -- | KTRKVDKPEPKKFKGEAVSKKAVTK |
| RanS1#2 | -- | SVKGAVEKVKAEKPDKPTKTKFKRK |
| S1TD | -- | GDEPKRSNAFKKPKKENKKNATPKK |
