Fig. 5. Three hypothetical models for dynamic movement of complex components. In the concerted model, all the components associate and dissociate simultaneously. In the partial association/dissociation model, each component associates or dissociates on an individual basis. In this case, there would be several different subcomplexes. In the static model, each component would be synthesized whenever necessary for other activities. In this case, the complex would be maintained stably once it is formed.