Gel Electrophoresis
Proteins are separated in an SDS-PAGE experiment on the basis of their

positively charged side chains
molecular weight
negatively charged side chains
different isoelectric points

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Gel Electrophoresis
In SDS-PAGE, the protein sample is first

treated with a oxidizing agent and then with anionic detergent followed by fractionation by electrophoresis
None of these
fractionated by electrophoresis then treated with an oxidizing agent followed by anionic detergent.
treated with a reducing agent and then with anionic detergent followed by fractionation by electrophoresis

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