Table 2. The number of helix families greater than or equal to each group size for the soluble and membrane protein sets.
| Group size | 5 | 10 | 20 | 50 | 100 |
| Membrane | 45 | 18 | 0 | 0 | 0 |
| Soluble | 1258 | 473 | 170 | 28 | 4 |
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