Which of the alternatives below indicates techniques used both to purify and to concentrate proteins, without losing the three-dimensional structure? a) diafiltration, affinity chromatography,...

Which of the alternatives below indicates techniques used both to purify and to concentrate proteins, without losing the three-dimensional structure? a) diafiltration, affinity chromatography, centrifugation b) diafiltration, salting out, affinity chromatography c) precipitation with organic solvent, diafiltration, centrifugation d) centrifugation, precipitation with organic solvent, salting out