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| Name | Sequence | Source | Ref. | |
|---|---|---|---|---|
| Natural occurring CPPs | ||||
| 1 | Tat | RKKRRQRRR | HIV | 2 and 3 |
| 2 | Penetratin | RQIKIWFQNRRMKWKK | Antennapedia | 4 |
| 3 | Arf(1–22) | MVRRFLVTLRIRRACGPPRVRV | p14Arf | 5 |
| 4 | M918 | MVTVLFRRLRIRRACGPPRVRV | p14Arf | 6 |
| 5 | Xentry | LCLRPVG | Hepatitis B virus | 7 |
| Synthetic CPPs | ||||
| 6 | PolyArg | Rn (n > 6) | NA | 8 |
| 7 | Pip | (RXR)3IKILFQNRRMKWKK | NA | 9 |
| 8 | CADY | GLWRALWRLLRSLWRLLWKA | NA | 10 |
