| AP-EN | human apurinic/apyrimidinic endonuclease |
| Fpg | E. coli formamidopyrimidine or 8-oxoguanine DNA glycosylase |
| I50 | inhibitor concentration reducing complexation by 50% |
| dNMPs | 5′-dexosimononucleotides |
| d(pN)n and ON | oligodeoxyribonucleotide |
| ss and ds | single- and double-stranded |
| SILC | stepwise increase in ligand complexity |
| topoisomerase I | human topoisomerase I |
| Pi | inorganic orthophosphate |
| kDa | kilo Daltons |
| dNMPs | nucleoside monophosphate |
| RA | relative activity |