4.2.1.109 5-(methylsulfanyl)-D-ribulose 1-phosphate = 5-(methylsulfanyl)-2,3-dioxopentyl phosphate + H2O - - 4.2.1.109 5-(methylsulfanyl)-D-ribulose 1-phosphate = 5-(methylsulfanyl)-2,3-dioxopentyl phosphate + H2O active site architecture and catalytic mechanism, overview 730835