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I have 100 mg of a proteinase K lyophilized powder and I need to make it to a working concentration of 25 mg/mL
So I know that I need to add $4~\mathrm{mL}$ of solution to this powder, which will give me a concentration of the enzyme at $25\ \mathrm{mg/mL}$. What I do not understand is how to decide how much of ...
