Retrieving "Inorganic Ions" from the archives

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1. Enzyme

   Linked via "inorganic ions"

   Cofactors and Coenzymes
   Many enzymes require non-protein helper molecules, known as cofactors, for their activity. These are broadly divided into inorganic ions (e.g., $\text{Mg}^{2+}$, $\text{Zn}^{2+}$) and organic molecules called coenzymes.
   Holoenzymes and Apoenzymes