UMP + phosphate = alpha-D-ribose 1,5-bisphosphate + uracil
ump + phosphate = alpha-d-ribose 1,5-bisphosphate + uracil
UMP + phosphate = alpha-D-ribose 1,5-bisphosphate + uracil
ump + phosphate = alpha-d-ribose 1,5-bisphosphate + uracil