a purine nucleobase + alpha-D-ribose 1-phosphate => a purine D-ribonucleoside + phosphate
a purine nucleobase + alpha-d-ribose 1-phosphate => a purine d-ribonucleoside + phosphate
a purine nucleobase + alpha-D-ribose 1-phosphate => a purine D-ribonucleoside + phosphate
a purine nucleobase + alpha-d-ribose 1-phosphate => a purine d-ribonucleoside + phosphate