(a(i))[2]
Use the Data Booklet to draw the full structure of the tripeptide Ala-Ser-Gly, including its peptide bonds.
(a(ii))[1]
Calculate the relative molecular mass, $M_r$, for Ala-Ser-Gly.
(b(i))[1]
Draw the structure of serine when $\text{pH} = 11$.
(b)
Electrophoresis may be used to separate mixtures of amino acids and peptides. A mixture containing the tripeptide Ala-Ser-Gly and its three constituent amino acids was run by electrophoresis in a buffer at pH 11.
(b(ii))[4]
Identify the components labelled F-I in the diagram above.
(b(iii))[3]
Suggest the identities of the species responsible for spot P and spot S, and explain your reasons.
(c(i))[1]
State the reagents and conditions needed to convert the tripeptide into its three constituent amino acids.
(c(ii))[1]
Name the reaction type in (i).