β-structure z Pleated sheets z Interchain H-bonds – All peptide bonds participate z Parallel or antiparallel z R-groups – Anti-parallel: sides with either all hydrophillic or hydrophobic chains – Parallel: more uniformly hydrophobic, rarely exposed to solvent z More stable than α-helix z Anti-parallel: associate in barrels – Core is very hydrophobicβ-structure z Pleated sheets z Interchain H-bonds – All peptide bonds participate z Parallel or antiparallel z R-groups – Anti-parallel: sides with either all hydrophillic or hydrophobic chains – Parallel: more uniformly hydrophobic, rarely exposed to solvent z More stable than α-helix z Anti-parallel: associate in barrels – Core is very hydrophobic