In: Chemistry
2. You are given a pure protein sample to characterize and provided the following information:
Its molar extinction coefficient, ε280, is 0.30 liters micromole-1 cm-1
Its ΔGo for unfolding is 1.5 kcal/mol at 37o (where RT = 0.59 kcal/mole)
A) Using a 0.5 cm pathlength cell, you measure the absorbance at 280 nm of a 25- fold dilution of your pure protein in solution and find A280 = 0.45. What is the original concentration of the protein before dilution?
B) What is the concentration of the unfolded form of the protein in your sample?