Main Reaction: Tyrosine >> L-DOPA

Reference: PubMed ID: 22409631
Authors: Harris NN, Javellana J, Davies KM, Lewis DH, Jameson PE, Deroles SC, Calcott KE, Gould KS, Schwinn KE
Title: Betalain production is possible in anthocyanin-producing plant species given the presence of DOPA-dioxygenase and L-DOPA.
Published: 2012 Mar 12

Tyrosine --> L-DOPA