42)How can recombinant DNA technology aid in protein purification? 43)Describe the Edman degradation method for protein-sequence analysis. 44)How can the amino acid sequences be used to design a DNA probe? 45)What is one advantage of using the recombinant DNA methods to determine protein sequences? 46)After a protein is purified, what is the next step in determining the structure of a protein by x-raycrystallography?