This study found several proteins in the salivary sample related to uncontrolled asthma: polycystic kidney and hepatic disease 1 (PKHD1)/fibrocystin, zinc finger protein 263 (ZNF263), uncharacterized LOC101060047 (ENSG00000268865), desmoglein 2 (DSG2), and S100 calcium-binding protein A2 (S100A2) [123]. The gene discussed is S100A2; the disease is polycystic kidney disease.