D-ribose 2,5-bisphosphate + H(+) => alpha-D-ribose 1,2-cyclic phosphate 5-phosphate + H2O
d-ribose 2,5-bisphosphate + h(+) => alpha-d-ribose 1,2-cyclic phosphate 5-phosphate + h2o
D-ribose 2,5-bisphosphate + H(+) => alpha-D-ribose 1,2-cyclic phosphate 5-phosphate + H2O
d-ribose 2,5-bisphosphate + h(+) => alpha-d-ribose 1,2-cyclic phosphate 5-phosphate + h2o