a pyrimidine nucleobase + 2-deoxy-D-ribose 5-phosphate => a pyrimidine 2'-deoxyribonucleoside 5'-phosphate + H2O
a pyrimidine nucleobase + 2-deoxy-d-ribose 5-phosphate => a pyrimidine 2'-deoxyribonucleoside 5'-phosphate + h2o
a pyrimidine nucleobase + 2-deoxy-D-ribose 5-phosphate => a pyrimidine 2'-deoxyribonucleoside 5'-phosphate + H2O
a pyrimidine nucleobase + 2-deoxy-d-ribose 5-phosphate => a pyrimidine 2'-deoxyribonucleoside 5'-phosphate + h2o