MUC5AC and cystic fibrosis: A prominent example is the correlation between mucin‐type O‐glycans and cystic fibrosis,[1, 4] where people with cystic fibrosis show significantly altered sulfation and sialylation in their sputum glycans.[5] Changes in the glycome are also associated with the occurrence of lung cancer,[6] prostate cancer[7] and ulcerative colitis,[8] demonstrating the widespread potential of glycomics to target sugars for diagnostics and treatments.