In the boxes, draw the structures of $ ext{M}$ and $ ext{N}$.
Suggest the reagents and reaction conditions for each stage of the synthesis.
A mixture containing serine, $\text{HOCH}_2\text{CH(NH}_2)\text{CO}_2\text{H}$, and lysine, $\text{H}_2\text{N(CH}_2)_4\text{CH(NH}_2)\text{CO}_2\text{H}$, forms a range of different products. Draw the structures of the two structural isomers with molecular formula $\text{C}_6\text{H}_{12}\text{N}_2\text{O}_5$ that may be present in the product mixture. The functional group formed in each one should be shown.
Predict how many different structural isomers with molecular formula $\text{C}_9\text{H}_{19}\text{N}_3\text{O}_4$ could be present in the product mixture.
Glutathione is a naturally occurring compound found in plants. On the glutathione diagram, mark each chiral centre with an asterisk $(*)$.
Draw the structures of the three products formed after complete acid hydrolysis of glutathione. Assume that the thiol group, $-\text{SH}$, does not react.
Glutathione is soluble in water. Using the structure of glutathione, explain why it dissolves in water.