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. 2009 May 13;6:44. doi: 10.1186/1742-4690-6-44

Table 4.

Formation of DEC or DEC-like complex by ddNTP-terminated DNA and HIV-1 RT in the presence of next correct dNTP, ddNTP or EFV.

Dideoxyadenosine analog as the chain-terminator
Next Correct dNTP or ddNTP EFV


DNA Terminator dCTP FTC-TP


Kd (μM) Bmax (%) Bmax/Kd Kd (μM) Bmax (%) Bmax/Kd Kd (μM) Bmax (%) Bmax/Kd

D20/D36 TFV 232 ± 12a 18.5 ± 6.7 0.079 250 ± 11 17.7 ± 3.9 0.071 0.70 ± 0.10 45.7 ± 10.0 65
ddAMP 21.5 ± 9.8 34.2 ± 4.6 1.6 171 ± 28 28.1 ± 4.7 0.16 1.20 ± 0.38 16.3 ± 3.5 13.6

D26/D50 TFV 179 ± 33 50.0 ± 5.5 0.28 46.5 ± 7.8 50.0 ± 5.0 1.1 1.22 ± 0.28 44.4 ± 3.7 36
ddAMP 8.1 ± 2.1 55.8 ± 3.4 6.9 86.8 ± 0.2 60.2 ± 7.2 0.69 2.42 ± 1.10 11.2 ± 0.6 4.6

Dideoxycytidine analog as the chain-terminator

Next Correct dNTP or ddNTP EFV


DNA Terminator dATP TFV-DP


Kd (μM) Bmax (%) Bmax/Kd Kd (μM) Bmax (%) Bmax/Kd Kd (μM) Bmax (%) Bmax/Kd

D20/D36 FTC-MP NDa ND ND ND ND ND 1.54 ± 0.33 5.53 ± 1.83 3.0
ddCMP 16.9 ± 8.5 38.0 ± 4.4 2.2 445 ± 114 15.3 ± 2.7 0.034 1.03 ± 0.25 14.9 ± 0.8 14.5

D27/D50 FTC-MP 862 ± 229 45 ± 14 0.052 ND ND ND 1.26 ± 0.24 3.96 ± 1.55 3.1
ddCMP 6.5 ± 2.6 60 ± 3 9.2 140 ± 19 55 ± 2 0.39 0.11 ± 0.06 10.6 ± 2.0 96

All Values reported are average ± standard deviation from at least three measurements.

aND = No DEC formation was detected at the highest concentration (2 mM) tested.