Antibodies against lysozyme. The structures of three complexes (i, ii, iii) between Fab fragments (blue and yellow) and hen egg-white lysozyme (red) shown with lysozyme in the same orientation in each case. Notice that the three antibodies recognize completely different epitopes on the lysozyme molecule.
[Drawn from 3HFL, 1DQJ, and 1FDL.pdb.]