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dNTP pools in HCT116 cells grown 1 h in the presence of thymidine (dT) and deoxyadenosine (dA) in the following concentrations: 500 μM thymidine (A) and 50 μM thymidine; 50 μM deoxyadenosine; 50 μM thymidine and 50 μM deoxyadenosine; and 50 μM thymidine and 20 μM deoxyadenosine (B).
