PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3697358-3 1986 Since OSCN- can form the weak acid HOSCN (pKa = 5.3), the equilibrium constant expression (Kox) for thiocyanate peroxidation is dependent on the concentration of hydrogen ions as well as the concentrations of H2O2, SCN-, HOSCN, OSCN- and water, and on the HOSCN ionization constant, Ka: (Formula: see text). thiocyanate 100-111 NADPH oxidase 4 Homo sapiens 91-94