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There is a term in chemistry called Solubility Product Constant or K

_{sp}which is:when a chemical compound in the solid state is in chemical equilibrium with a solution of that compound, we can write an equilibrium constant named K

_{sp}.aA

_{(s)}⇌cC_{(aq)}+dD_{(aq)}K

_{sp}=[C]^{c}[D]^{d}(this is the link to wikipedia and chemwiki for anyone who wants to read more about it)

is it possible to measure such value for a protein? how is it possible?Q: