low levels of deoxyribonucldoside triphosphates during g1 ( 0.3-1.3 pmol/10 ( 7 ) cells ) increased coordinately with the initiation of dna synthesis to an initial peak during mid s-phase ( 0.5-6.4 pmol/10 ( 7 ) cells ) .
C0080129
s-phase
C0007634
cells