Enzymatic Phosphorylation of Oxidized Tyrosine Residues Noopept and Dihexa are the Top 2 UNDERRATED nootropic aids for ANYONE looking to improve their neurological functionality! We've used these individually and other times synergistically among certain cases that require big Figure 1 from Engineering of L tyrosine oxidation in Escherichia coli and microbial production of hydroxytyrosol. Semantic Scholar Elucidation of the tyrosinase O2 monophenol ternary intermediate that dictates the monooxygenation mechanism in melanin biosynthesis PNAS Figure 2. [The tyrosine degradation pathway. Alkaptonuria]. GeneReviews NCBI Bookshelf