Question $2$: $(15$ Marks$)$

Please refer to the following peptide structure for the subsequent questions:

a$.$ What is the amino acid sequence of this peptide using $1$ letter code $(5$ marks$)?$

b$.$ Use the grid below to list charges of all possible ionisable groups at $pH3\mathrm{.}0($list from left$>$right$)$ groups going from

amino to carboxy terminus, which will allow calculation of net charge of this peptide at pH $3?(4$ marks $)$

c$.$ List amino acid $($single letter code$)$ that have side chains $($R groups$)$ in the peptide that: $(6$ Marks$)$