Theanine, the ethyl amide of glutamic acid, is the main amino acid in the fresh leaf and contributes 1 to 2 percent of the dried weight, but other amino acids arise during the early part of the processing.

• 茶氨酸是谷氨酸的乙酰胺，它是鲜茶叶中的主要氨基酸，占干茶叶重量的1~2%25，其它氨基酸则是在加工早期出现的。