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. 2004 Sep 30;32(17):5134–5146. doi: 10.1093/nar/gkh846

Table 3. Affinities of APE1 for ORNs and their duplexesa.

Ligand IC50 (μM)a KI (μM) Ligand IC50 (μM)b KI (μM) Ligand IC50 (μM)b KI (μM)
ss ORNs                
AMP 1120 373 UMP 5620 1873 CMP 1340 447
(pA)2 789 263       (pC)2 949 316
(pA)3 597 199            
(pA)4 550 183 (pU)4 2100 700 (pC)4 641 214
(pA)6 300 100 (pU)6 1129 339 (pC)6 361 120
(pA)8 110 36.7 (pU)8 534 178 (pC)8 212 70.8
(pA)9 80.7 26.9 (pU)9 475 158      
(pA)10 80 26.7 (pU)10 471 157 (pC)10 134 44.7
(pA)12 90 30 (pU)11 477 159 (pC)14 114 38
(pA)16 90 30 (pU)16 455 158      
ds ORNs                
(pU)4·(pA)4 405 135 (pA)4·d(pT)4 22.7 7.59      
(pU)6·(pA)6 49.8 16.6 (pA)6·d(pT)6 64.1 21.4      
(pU)9·(pA)9 50 16.7 (pA)8·d(pT)8 18.93 6.3      
(pU)10·(pA)10 30 10 (pA)10·d(pT)10 7.5 2.5      
      (pA)11·d(pT)11 7.5 2.5      
(pU)16·(pA)16 30 10 (pA)16·d(pT)16 7.5 2.5      

aError in directly determined KI (shown in bold) and IC50 values was 10–30%; means of three to four measurements are given.

bKI values not in bold were calculated from the respective IC50 values.