ration of q/ms and SDS PAGE

[2810712]

In SDS PAGE we use sodium dodecyl sufate to make the ration of q/m s of two diff peptides nearly equal still keeping the difference between them the same. This tells that this ration is only important here... why???

I think the difference in the displacements of the two peps in the gel depends only of the ration of their q/ms. What is its expression???


Shrei