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Metal oxide crystallization mediated by catalytic peptide in methanol. (a) (Left) The natural protein subtilisin and (right) the catalytic oligopeptide CP4. Microscopic studies of ZnO nanocrystals synthesized through ester elimination with (b,c) CP4 peptide and (d) subtilisin at room temperature. (e,f) Transmission electron microscope images of crystalline MnFe2O4 prepared using an ester elimination reaction catalyzed by CP4.
