Details:
Interacting selectively and non-covalently with the BH3 domain of a protein of the Bcl-2 family. The BH3 domain is a potent death domain and has an important role in protein-protein interactions and in cell death. [PMID:11048732, PMID:12133724, PMID:9020082, PMID:9704409, Prosite:PS01259]