Table 1.
Inter-subunit disulfide bonds within and between structural parts of Milano
| Within sub-structure | ||
| Tube | gp21, Cys3 | gp21, Cys19 |
| gp21, Cys43 | gp21, Cys82 | |
| Sheath | gp20, Cys14 | gp20, Cys244 |
| gp20, Cys47 | gp20, Cys182 | |
| gp20, Cys216 | gp20, Cys327 | |
| Base-plate wedge | BW1 (gp28), Cys3 | BW3 (gp30), Cys22 |
| BW1 (gp28), Cys22 | BW3 (gp30), Cys75 | |
| BW2outer (gp29), Cys68 | BW3 (gp30), Cys23 | |
| BW2outer (gp29), Cys282 | BW3 (gp30), Cys206 | |
| BW2outer (gp29), Cys302 | BW3 (gp30), Cys130 | |
| BW2outer (gp29), Cys395 | BW2Inner (gp29), Cys234 | |
| BW2outer (gp29), Cys3 | BW2inner (gp29), Cys68 | |
| BW2outer (gp29), Cys234 | BW2inner (gp29), Cys282 | |
| Tail spike | TSP (gp124), Cys24 | TSP (gp124), Cys24 |
| TSP (gp124), Cys24 | TSP (gp124), Cys26 | |
| TSP (gp124), Cys26 | TSP (gp124), Cys26 | |
| Short tail fiber | STF (gp31), Cys29 | STF (gp31), Cys67 |
| STF (gp31), Cys84 | STF (gp31), Cys102 | |
| STF (gp31), Cys127 | STF (gp31), Cys144 | |
| Between sub-structures | ||
| Tube—baseplate centerpiece | Tube (gp21), Cys19 | BCP (gp25), Cys5 |
| Sheath—baseplate wedge | BW1 (gp28), Cys32 | Sheath (gp20), Cys14 |
| BW1 (gp28), Cys74 | Sheath (gp20), Cys501 | |
| BW1 (gp28), Cys29 | Sheath (gp20), Cys501 | |
| Sheath—long tail spike | Sheath (gp20), Cys327 | TSP (gp124), Cys15 |
| Baseplate wedge—tail spike | BW1 (gp28), Cys41 | TSP (gp124), Cys15 |
| BW3 (gp30), Cys69 | TSP (gp124), Cys15 | |
| Baseplate wedge—short-tail fiber | BW2Inner (gp29), Cys302 | STF (gp31), Cys38 |
| BW2Inner (gp29), Cys224 | STF (gp31), Cys38 | |
| BW2Inner (gp29), Cys367 | STF (gp31), Cys38 | |
| BW2Outer (gp29), Cys367 | STF (gp31), Cys38 | |
| BW2Outer (gp29), Cys224 | STF (gp31), Cys38 | |
| BW3 (gp30), Cys147 | STF (gp31), Cys38 | |
| Baseplate centerpiece—baseplate wedge | BCP (gp25), Cys318 | BW2Inner (gp29), Cys3 |