Tyrosine is a non-critical phenylalanine-derived amino acid. Tyrosine’s composition is produced a para-hydroxylated phenyl ring linked to a pentanoic acid group, that's a 5 member carbon chain using a carboxyl (C(=O)OH) team about the terminal carbon. This pentanoic acid chain is substituted at R2 with the amino group in levorotary https://nimmansocial.com/story7196153/5-simple-statements-about-ppap-hcl-explained