Given the peptide: R-K-G-C-V

a. Complete name of the pentapeptide

b. Draw the structure of the pentapeptide at pH=9 and pH=11

c. Calculate the pI of the peptide. Refer to Table of pK values of individual amino acids

d. Is this peptide soluble at neutral pH solution? Yes or No. Why?

Given the peptide: val-phe-arg-cys-met-ser-ile-tyr-leu

a. Complete name of this oligopeptide

b. Draw the structure of this peptide at pH=10

c. Calculate the pI of the peptide. Refer to Table of pK values of individual amino acids

d. Is this peptide soluble at neutral pH solution? Yes or No? Why?