Structures of two repeats of spectrin suggest models of flexibility.
Grum, V.L., Li, D., MacDonald, R.I., Mondragon, A.(1999) Cell 98: 523-535
- PubMed: 10481916 
- PubMed Abstract: 
Spectrin is a vital component of the cytoskeleton, conferring flexibility on cells and providing a scaffold for a variety of proteins. It is composed of tandem, antiparallel coiled-coil repeats. We report four related crystal structures at 1.45 A, 2. ...