Structural origins of high-affinity biotin binding to streptavidin.
Weber, P.C., Ohlendorf, D.H., Wendoloski, J.J., Salemme, F.R.(1989) Science 243: 85-88
- PubMed: 2911722 
- DOI: 10.1126/science.2911722
- Primary Citation of Related Structures:  
1STP - PubMed Abstract: 
The high affinity of the noncovalent interaction between biotin and streptavidin forms the basis for many diagnostic assays that require the formation of an irreversible and specific linkage between biological macromolecules. Comparison of the refined crystal structures of apo and a streptavidin:biotin complex shows that the high affinity results from several factors ...