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Comparison of helical symmetry parameters among bacterial pili of the Tff superfamily.
| Pili | Rise (Å) | Twist (°) |
|---|---|---|
| Neisseria meningitidis type 4a pili | 10.3 | 100.8 |
| Neisseria gonorrhoeae type 4a pili | 10.1 | 100.8 |
| Pseudomonas aeruginosa type 4a pili | 10.5 | 87.3 |
| Escherichia coli type 4a pili | 11.2 | 96.0 |
| Klebsiella oxytoca T2SS pseudopili | 10.2 | 83.2 |
