亮氨酸 Traditional form: 亮氨酸 Pinyin (reading): liàng'ānsuān Definitions: leucine (Leu), an essential amino acid Characters: 亮 - bright, brilliant, radiant, light 氨 - ammonia 酸 - tart, sour; spoiled; acid Traditional characters: 亮 - bright, brilliant, radiant, light 氨 - ammonia 酸 - tart, sour; spoiled; acid