a 2'-deoxyribonucleoside + a ribonucleoside 5'-phosphate <=> a ribonucleoside + a 2'-deoxyribonucleoside 5'-phosphate
a 2'-deoxyribonucleoside + a ribonucleoside 5'-phosphate <=> a ribonucleoside + a 2'-deoxyribonucleoside 5'-phosphate