Suggested Reaction 3.1.3.-

Left

2-Amino-4-hydroxy-6-(erythro-1,2,3-trihydroxypropyl)dihydropteridine triphosphate
+H2O

Right

2-Amino-4-hydroxy-6-(D-erythro-1,2,3-trihydroxypropyl)-7,8- dihydropteridine
+Triphosphate

[BiSSCat | GREP ]