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

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

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

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

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Gel Electrophoresis
In an SDS-PAGE

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

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