| very | 10 | degree |
| to infer by genomics | 5 | other |
| often | 4 | degree |
| protein → be → difficult | 50 |
| protein → be difficult to → produce | 8 |
| protein → be not → easy | 5 |
| protein → be difficult to → work | 3 |
| negative | neutral | positive |
| 0.481 | 0.397 | 0.121 |
| Raw frequency | 66 |
| Normalized frequency | 0.485 |
| Modifier score | 0.631 |
| Perplexity | 250.156 |