Phenylalanine/tyrosine ammonia-lyase

Template:Infobox enzyme Phenylalanine/tyrosine ammonia-lyase (EC 4.3.1.25, PTAL, bifunctional PAL) is an enzyme with systematic name L-phenylalanine(or L-tyrosine):trans-cinnamate(or trans-p-hydroxycinnamate) ammonia-lyase. This enzyme catalyses the following chemical reaction

(1) L-phenylalanine $\rightleftharpoons$ trans-cinnamate + NH₃

(2) L- tyrosine $\rightleftharpoons$ trans-p-hydroxycinnamate + NH₃

This enzyme is a member of the aromatic amino acid lyase family.

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