Atetrameric protein dissociates into dimers when the detergent sodium dodecyl sulfate (sds) is added to a solution of the protein. but the dimers are termed sds-resistant because they do not further dissociate into monomers in the presence of the detergent. what intermolecular forces might be acting at the dimer-dimer interface? are the intermolecular forces acting at the monomer-monomer interface different? explain.

At the dimer-dimer interface there might be acting non-covalent forces (van der waals, Hidrogene bridges, hydrophobic forces)

At the monomer-monomer interface there might be covalent forces acting (disulfide bridges).

Explanation:

On the SDS-PAGE application  works by disrupting non-covalent bonds in the proteins, and so denaturing them. Therefore, the disulfide bridges won´t be disrupted, so the monomers will remain bounded.

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