Name the mechanism taking place in the following steps. step 1; step 2.
What kind of reaction is taking place in step 3?
Suggest reagents and conditions for each of the following stages. step 1; step 2; step 3; step 5.
Draw the structures of the products formed when tyrosine reacts with an excess of each of the following reagents: with $\text{NaOH(aq)}$; with $\text{HCl(aq)}$; with $\text{Br}_2\text{(aq)}$.
Draw the structures of the products formed when tyrosine reacts with excess of each of the following reagents: with NaOH(aq); with HCl(aq); with Br$_2$(aq).
The dipeptide phe-tyr has the structure shown below. A mixture containing this dipeptide (phe-tyr) together with its two amino acid components (phe and tyr) was separated by electrophoresis in a buffer at pH 12. When the experiment ended, the results below were observed. Spots R and S stayed very close to each other. The three spots arise from the three species phe, tyr and phe-tyr.
Which species gives spot P? Explain your answer.
Suggest why the other two species produce spots R and S that are so close together.