Essential amino acids, or EAAs, are amino acids that our body needs but cannot produce on its own, and there are 9 of them: Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

基本氨基酸，简称 EAA，是我们体需要但不能自己产生的氨基酸，其中有 9 种：氨酸，异亮氨酸，亮氨酸，赖氨酸，蛋氨酸，苯丙氨酸，苏氨酸，色氨酸和缬氨酸。

Aldolase A is made of 350 amino acids, the building blocks of proteins, but the bit that does the work consists of only three of these: lysine, glutamic acid and tyrosine. The rest of the enzyme is packaging.

醛缩酶A由350种氨基酸成，这些氨基酸是蛋白质的成成分，但起作用的部分只有三个：赖氨酸、谷氨酸和酪氨酸。剩下的酶是包装的。