Mobility-shift assays can inform about protein-nucleic acidinteractions by comparing:
a) the lengths of primer extension reactions in agarosegels.
b) elution times during affinity column chromatography.
c) sedimentation coefficients following gradientcentrifugation.
d) the migration of molecular complexes in a non-denaturingpolyacrylamide gels.
e) none of the above.
