D-ribose 5-phosphate + CTP + H(+) => CDP-D-ribose + diphosphate
d-ribose 5-phosphate + ctp + h(+) => cdp-d-ribose + diphosphate
D-ribose 5-phosphate + CTP + H(+) => CDP-D-ribose + diphosphate
d-ribose 5-phosphate + ctp + h(+) => cdp-d-ribose + diphosphate