Which of the following effects would the amino acid proline have within a polypeptide chain? (Hint: Think about what must happen to a polypeptide in order to make it a functional protein)
1) It would increase the stability of the polypeptide chain
2) It would decrease the stability of the polypeptide chain
3) It would have no effect on the stability of the polypeptide chain
4) It would prevent the polypeptide chain from folding into its functional conformation