| 摘要 |
The present invention provides a method for obtaining a cobalt-apoferritin complex in which a cobalt particle having a uniform diameter is formed. First, as shown in Step St1, a reaction solution is prepared by mixing a HEPES buffer solution, an apoferritin solution and a Co<2+> ion solution (e.g. cobalt nitrate) in this order, as shown in FIG. 2. Next, in Step St2, an oxidizing agent (e.g., H2O2) is added to the reaction solution as shown in FIG. 2. By this operation, cobalt hydroxide (CoO(OH)) is introduced into a holding portion 4 of the apoferritin 1 so that cobalt-apoferritin complexes are generated. Note that all operations for producing the cobalt-apoferritin complexes described above are carried out at room temperature while the reaction solution is stirred by a stirrer. <IMAGE>
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