Question

In the protein purification process, dialysis is performed after salting out, and then chromatography is done as the final purification step. Why is dialysis necessary before chromatography? Myoglobin has an isoelectric point, pI, of 7.2. What will happen if it is loaded on an ion-exchange column containing CM sepharose in a buffer of pH 8? What will be the original concentration of a solution if the absorbance of the diluted solution is 0.209 when this solution is placed in a 1.00 cm cuvette and 280 nm radiation is passed through it? The molar absorptivity, ε, is 0.0418 M-1 cm-1, and the dilution factor is 10. Report your answer in the correct units. Out of the two methods of enzyme kinetics, the Michaelis-Menten equation and the Lineweaver-Burk equation for determining the kinetic constants Km and Vmax, which one is a better method and why? What is the role of Dithiothreitol (DTT) in SDS-PAGE?

          In the protein purification process, dialysis is performed after salting out, and then chromatography is done as the final purification step. Why is dialysis necessary before chromatography?

Myoglobin has an isoelectric point, pI, of 7.2. What will happen if it is loaded on an ion-exchange column containing CM sepharose in a buffer of pH 8?

What will be the original concentration of a solution if the absorbance of the diluted solution is 0.209 when this solution is placed in a 1.00 cm cuvette and 280 nm radiation is passed through it? The molar absorptivity, ε, is 0.0418 M-1 cm-1, and the dilution factor is 10. Report your answer in the correct units.

Out of the two methods of enzyme kinetics, the Michaelis-Menten equation and the Lineweaver-Burk equation for determining the kinetic constants Km and Vmax, which one is a better method and why?

What is the role of Dithiothreitol (DTT) in SDS-PAGE?

Added by Bradley H.

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