4-hydroxyphenylpyruvate 4-hydroxyphenylacetaldehyde + CO2
This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is 4-hydroxyphenylpyruvate carboxy-lyase (4-hydroxyphenylacetaldehyde-forming). This enzyme is also called 4-hydroxyphenylpyruvate carboxy-lyase.
References
Rueffer M, Zenk MH (1987). "Distant precursors of benzylisoquinoline alkaloids and their enzymatic formation". Z. Naturforsch. C: Biosci. 42: 319–332.