In certain bacteria, the biosynthesis of aromatic amino acids
(phenylalanine, tyrosine, and tryptophan) proceeds by a branched pathway
where some intermediates are used to make more than one amino acid. The
pathway and some key intermediates are shown below.
This pathway is regulated by feedback inhibition at enzymes a through e.
For parts a through e, list the intermediates and products shown which you
might expect to be inhibitors of each enzyme. Explain your answer briefly.