There are very few of Ca dependent proteases. I am not sure kinases need metals as cofactors (activation is a different thing; that's signaling). Alkaline phosphatase needs Zn. But I guess this is not as common as the dependence of nucleases on metal ions. In any case we do use a protein inhibitor cocktail while doing extraction.
Summary. 1  Incorporation and corporation cannot be differentiated as one leads to the other. 2  While incorporation is the process, corporation is the organisation formed out of this process.
What are the main differences between a C corporation and an S corporation? C corporations are subject to double taxation; that is, one tax at the corporate level on the corporation's net income, and another tax to the shareholders when the profits are distributed. S corporations have only one level of taxation. All of their income is allocated to the shareholders.