3 of 3 6. An oligopeptide with the sequence S-K-H-L-I-P-V-F-W-C was obtained from spinach. (28 pts.) a) Draw the complete chemical structure of this oligopeptide in the form that would predominate at pH 7. (5 pts.) b) On your structure above, carefully draw a rectangle around those atoms in one peptide bond that are forced into a plane due to formation of that peptide bond. (15 pts. c) Calculate the net charge of the above oligopeptide, to the nearest 0.01, at pH 8. Show all calculations