The cytoskeleton of eukaryotic cells is made of filamentous proteins, and it provides mechanical support to the cell and its cytoplasmic constituents. All cytoskeletons consist of three major classes ...

General insights into helical protein polymers can be found from studies of actin (in eukaryotes) and RecA (in bacteria), each of which can be the most abundant protein in a cell. Actin and RecA are ...