Abstract
An enzyme-based bio-nanoreactor: By acting as a mineralization template, lumazine synthase, a 60-subunit enzyme complex which has a hollow porous shell, can fabricate nanocrystalline iron oxide. Fe ions can permeate the capsid through hydrophilic funnel-shaped channels lined with glutamic acid residues and become encapsulated in the cavity as FeIII oxide. The capsid increases in size from 15 to 30 nm in diameter through formation of a higher order structure as the concentration of FeIII increases.
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