Figure 2From: Protein dynamics and conformational selection in bidirectional signal transductionBecause both ephrins and Eph receptors have multiple binding sites, however, Eph-ephrin binding may further form hetero-tetramer or higher oligomers if tighter cell-cell adhesion is required [11]. The figure shows the dimeric and tetrameric complexes observed in the crystal structure (PDB: 1KGY).Back to article page