When considering the factors that influence the mobility of macromolecules, the relaxation effect would tend to ________ electrophoretic mobility, because there is a momentary ________.

Question

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Electrophoresing macromolecules migrate by a series of irregular jumps.At each jump, the counterion atmosphere is briefly left behind.The counterions then move to catch up.Until they catch up, these counterions momentarily produce a field that acts in the opposite direction to that of the applied field, lowering the mobility of the macromolecule.

When Considering the Factors That Influence the Mobility of Macromolecules