Three-dimensional structure of an anti-steroid Fab' and progesterone-Fab' complex.
Arevalo, J.H., Stura, E.A., Taussig, M.J., Wilson, I.A.(1993) J Mol Biol 231: 103-118
- PubMed: 8496956 
- DOI: 10.1006/jmbi.1993.1260
- Primary Citation of Related Structures:  
1DBA, 1DBB - PubMed Abstract: 
The monoclonal anti-progesterone antibody DB3 binds progesterone with nanomolar affinity (Ka approximately 10(9) M-1), suggesting high specificity. However, DB3 also cross-reacts with similar affinity with a subgroup of structurally distinct, progesterone-like steroids ...