Select the statements which describe affinity chromatography. Note that size exclusion chromatography is also known as gel filtration or molecular exclusion chromatography.
1) Affinity chromatography is a technique used to separate and purify proteins based on their specific interactions with ligands.
2) In affinity chromatography, the stationary phase contains a ligand that binds specifically to the target protein.
3) Size exclusion chromatography is a technique used to separate proteins based on their size and shape.
4) Gel filtration chromatography is another name for size exclusion chromatography.
5) Molecular exclusion chromatography is another name for size exclusion chromatography.