does SDS-PAGE break up polymers of peptides?

[BlueComet]

I am working on the Physical/Chemical section bank questions and for # 64 it asks which protein would travel fastest with SDS-PAGE under nonreducing conditions. I understand that this is due to charge/mass ratio, so smallest mass protein would travel fastest, but it says that the trimers would be broken up but not disulfide bonds. How is this the case? I understand disulfide bonds wouldnt be broken due to nonreducing conditions, but does SDS page break up peptides into monomers even under non reducing conditions? What kind of bonds hold together polymers of a peptide? Is it not peptide bonds?

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[BlueComet]

Anyone know if SDS PAGE breaks up protein polymers into monomers (under nonreducing conditions?)

 

[BlueComet]

This is the chart in question. Also the question notes there are no disulfide bonds unless stated in the chart. So judging from this, under nonreducing conditions, the homotrimers should stay trimers correct? But the answer says they are broken up in monomers. How can this be with SDS PAGE under nonreducing conditions?

 

[WedgeDawg]

Please do not post threads in multiple areas. Thanks.

Closing this thread, please direct comments to this one in pre-allo: Does SDS PAGE break up protein polymers under nonreducing conditions?