3.5.1.65 N5-ethyl-L-glutamine + H2O - 3.5.1.65 N5-ethyl-L-glutamine + H2O predominant amino acid of tea 3.5.1.65 N5-ethyl-L-glutamine + H2O N-ethyl-gamma-L-glutamine 3.5.1.65 N5-ethyl-L-glutamine + H2O L-theanine, gamma-glutamylethylamide, principal component of taste of tea 3.5.1.65 N5-ethyl-L-glutamine + H2O part in metabolism of theanine in tea leaves: theanine is involved in the biosynthesis of other compound in tea plants, theanine also appears to be involved in storage or transport of nitrogen in non-toxic form in tea plants