Glutathione is a Cys-containing tripeptide. The sequence of glutathione is gamma-Glu-Cys-Gly. The gamma-Glu indicates that the first peptide bond forms between the gamma-carboxyl group of the Glu side chain and the alpha-amino group of Cys. Draw the complete Lewis structure of glutathione at pH 7.0 and label the peptide bonds, the N-terminus, and the C-terminus.