%0 Journal Article %T Structure-based understanding of ligand affinity using human thrombin as a model system. %A Nienaber, V L %A Mersinger, L J %A Kettner, C A %J Biochemistry %V 35 %N 30 %P 9690-9 %@ 0006-2960 %D 1996-09-10 %~ DeepDyve