Figure 1
The process of crystallization may select nonphysiological protein associations. (a) The physiological state of the protein is a dimer and the dimer can be crystallized to provide a structure. (b) The physiological state of the protein is a dimer. The dimer cannot pack into a lattice to produce a crystal, but the monomer alone can. Therefore, the crystal structure contains the nonphysiological state. (c) and (d) demonstrate an analogous case where the physiological state is a monomer. For clarity, the physiological oligomerization state is circled. |