Protein structure

From DrugPedia: A Wikipedia for Drug discovery

A number of residues are necessary to perform a particular biochemical function, and around 40-50 residues appears to be the lower limit for a functional domain size. Protein sizes range from this lower limit to several thousand residues in multi-functional or structural proteins. However, the current estimate for the average protein length is around 300 residues.Template:Fact Very large aggregates can be formed from protein subunits, for example many thousand actin molecules assemble into a collagen filament.