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Group assignment of precursors
| Group | Species | Characteristics |
|---|---|---|
| 1 | proOmpA, pPhoA, pGBP | Highest competence, highest percentage translocation of competent precursor |
| 2 | pMBPY283D, pRBPA248T, properiOmpA | Competence increases with destabilized channel, PrlA4 |
| 3 | pLamB, pPhoE | Low competence, aggregates over time |
| 4 | proOmpAN176 | Low competence, but remains competent over time |
