1 6 6 11 11 16 16 21 21 26 26 31 31 36 36 41 41 46 46 51 51 56 56 61 61 66 66 71 71 76 76 81 81 86 86 Residue 1 Residue 2 Distance (Ångstroms) 0 40+ White areas: PDB missing residues α-helix β-strand Bind Sequence