What is the definition of a protein-binding site?Choose one:A. the region of the cell where proteins are assembled based on information from the genetic codeB. a pocket on a protein where a small molecule can be covalently attached and thus modify the proteinC. the portion of a protein that attaches to the cell membrane and tethers the protein as a peripheral membrane proteinD. any region on a protein’s surface that interacts with another molecule through noncovalent bonding