Gel Electrophoresis
In isoelectric focusing, proteins are separated on the basis of their

relative content of positively and negatively charged residue
relative content of positively charged residue only
size
relative content of negatively charged residue only

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Gel Electrophoresis
In an SDS-PAGE

All of these
proteins have the same charge-to-mass ratio
proteins are denatured by the SDS
smaller proteins migrate more rapidly through the gel

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Gel Electrophoresis
Electrophoresis of histones and myoglobin under non-denaturing conditions (pH = 7.0) results in

histones migrate to the cathode and myoglobin migrates to the anode
both proteins migrate to the cathode
both proteins migrate to the anode
histones migrate to the anode and myoglobin migrates to the cathode

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