Fig. 3From: Organic–inorganic hybrid nanoflowers: types, characteristics, and future prospects a Allosteric effect of α-amylase: α-amylase changes from inactive form to active form by binding calcium ion to allosteric site in inactive α-amylase and b α-amylase immobilized in nanocrystals. Reproduced with permission from Ref. [44]: Copyright 2013, American Chemical SocietyBack to article page