Tyrosine is usually a non-crucial phenylalanine-derived amino acid. Tyrosine’s construction is made a para-hydroxylated phenyl ring connected to a pentanoic acid group, and that is a 5 member carbon chain that has a carboxyl (C(=O)OH) team on the terminal carbon. This pentanoic acid chain is substituted at R2 with an amino group in levorotary ori