cyperus rotundus/tyrosine

In the nutsedge, Cyperus rotundus L., the oxidation of L-tyrosine follows steps similar to those reported for mammalian liver and Blattella conjuncta. The system is activated by alpha-keto-glutarate, L-ascorbic acid, glutathione, and pyridoxal phosphate. Folic acid markedly inhibits the reaction.

Nitrosylation of tyrosine (3-nitro tyrosine, 3-NT) has been implicated in the pathophysiology of various disorders particularly neurodegenerative conditions and aging. Cyperus rotundus rhizome is being used as a traditional folk medicine to alleviate a variety of disorders including neuronal stress.