we propose that substrate cycles , involving phosphorylation of deoxyribonucleosides by kinases and dephosphorylation of deoxyribonucleoside 5'-phosphates by a nucleotidase , participate in the regulation of the size of pyrimidine deoxyribonucleoside triphosphate pools by directing the flow of deoxyribonucleosides across the cell membrane .
C0031715
phosphorylation
C0031727
kinases