d4t was found to be a weak substrate for purified h9 cytosolic thymidine kinase ( km = 138 microm ) and a weak competitive inhibitor of thymidine and deoxyuridine phosphorylation by this enzyme ( ki = 1.37 and 0.33 mm respectively ) .
C1522555
cytosolic thymidine kinase
C0031715
phosphorylation