Gel Electrophoresis
The subunit molecular weight as well as the number of subunits in the quaternary structure can be determined by

isoelectric focusing
gel filtration chromatography
combining information from (a)and (b)
SDS-PAGE electrophoresis

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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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