Final answer:
All responses provided (receptors in their native configuration, an antibody that binds the receptor of interest, and a method for eluting the bound receptor) are required for successful affinity chromatography purification of a receptor.
Step-by-step explanation:
Affinity chromatography purification of a receptor requires solubilized membrane proteins to maintain receptors in their native configuration, utilize an antibody that binds the receptor of interest, and apply a method for eluting the bound receptor. Therefore, the correct answer is d. All of the answers are correct. In the affinity chromatography process, the specific antibody acts as a ligand to which the receptor binds when the solubilized membrane proteins are passed through the column. Once bound, the receptor can be eluted from the column by changing the conditions, such as pH or salt concentration, to release the receptor from the antibody.