arsenite + methanol + A + H(+) => methylarsonous acid + AH2 + O2
arsenite + methanol + a + h(+) => methylarsonous acid + ah2 + o2
arsenite + methanol + A + H(+) => methylarsonous acid + AH2 + O2
arsenite + methanol + a + h(+) => methylarsonous acid + ah2 + o2