Figure 5. Conserved dimer-like interaction among β-crystallins and γS-crystallin.
A–E show ribbon traces to illustrate different arrangements of monomeric γ-crystallins and multimeric β-crystallins in crystal structures. A: chicken γS monomer. B: human βB1 dimer with QR interface. C: human βB3 trimer. D: human βB2 domain-swapped dimer. E: The non-bonded crystal lattice tetramer of human βB2. F and G: Two views of a structural alignment of crystal dimeric or monomer-monomer interactions about the QR interface for γS (red), βB1 (green), βB2 (yellow) and βA4 (blue).