4-methylsulfanyl-2-oxobutanoate + formate + 2 H(+) => 1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + O2
4-methylsulfanyl-2-oxobutanoate + formate + 2 h(+) => 1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + o2
4-methylsulfanyl-2-oxobutanoate + formate + 2 H(+) => 1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + O2
4-methylsulfanyl-2-oxobutanoate + formate + 2 h(+) => 1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + o2