Question: Explain why a certain protein has an apparent molecular mass of 90 kD when determined by gel filtration and 60 kD when determined by SDS-PAGE

Explain why a certain protein has an apparent molecular mass of 90 kD when determined by gel filtration and 60 kD when determined by SDS-PAGE in the presence or absence of 2-mercaptoethanol.Which molecular mass determination is more accurate?

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