berberin

Berberine is an alkaloid derived from tyrosine. achieve3000 login L -DOPA and 4-hydroxypyruvic acid both come from L -tyrosine. achieve3000 login Although two tyrosine molecules are used in the biosynthetic pathway, only the phenethylamine fragment of the tetrahydroisoquinoline ring system is formed via DOPA, the remaining carbon atoms come from tyrosine via 4