Tyrosine ammonia-lyase

Tyrosine ammonia lyase (EC 4.3.1.23,  L -tyrosine ammonia-lyase, TAL or Tyrase) is an enzyme in the natural phenols biosynthesis pathway. It transforms L -tyrosine into p-coumaric acid.
 * L-Tyrosin - L-Tyrosine.svg $$\xrightarrow{TAL}$$ Coumaric acid acsv.svg + Ammonia + H+

L -tyrosine = trans-p-hydroxycinnamate + NH3