s phase ribonucleotide reductase activity measured in situ resembled the previously characterized activity in exponentially growing cells with respect to an absolute dependence on atp or its analogs as positive allosteric effector , sensitivity to the negative allosteric effector datp , and low susceptibility to stimulation by nadph , dithiothreitol , and fecl3 .
C0080129
s phase
C0007634
the