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含硫氨基酸通过影响细胞氧化还原、细胞清除毒性物质、自由基和反应性氧类物质(Reactive oxygen species,ROS),来维护和整合细胞系统。甲硫氨酸和半胱氨酸是动物体内两个主要的含硫氨基酸。甲硫氨酸是必需氨基酸,可通过食物获取;而半胱氨酸是非必需氨基酸,是甲硫氨酸的代谢产物
Sulfur-containing amino acids maintain and integrate cell systems by affecting cellular redox, cellular scavenging toxic substances, free radicals and reactive oxygen species (ROS). Methionine and cysteine are two major sulfur-containing amino acids in animals. Methionine is an essential amino acid that is available through food, whereas cysteine is a non-essential amino acid that is a metabolite of methionine