Ferritin family proteins and their use in bionanotechnology.

•We discuss bionanotechnology applications of ferritin family proteins.•Ferritin family proteins are able to mineralise a range of metal ions.•The ferritin and DPS cages can be used in semi-conductor patterning.•We explore a commercial application of ferritin as a phosphate removal system for water purification.•We examine how the superparamagnetic properties of iron-loaded ferritin can be used in medical imaging.