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.
When a corporation is originally chartered by the state, it exists as a C Corporation. It will remain a C corporation unless the company wishes to elect S corporation status. S Corporations. The main difference between a C corporation and an S corporation is the taxation structure. S corporations only pay one level of taxation: at the shareholder level. To choose S corporation status, a tax lawyer or accountant may assist with filing IRS Form 2553 and ensuring all S corporation guidelines are met.