immunoglobulin gamma chain

例句：

1. 1. The study found that the immune system is responsible for fighting off infections.
   研究发现免疫系统负责抵御感染。
2. 2. The researcher identified the molecular structure of the immunoglobulin gamma chain.
   研究者确定了免疫球蛋白γ链的分子结构。
3. 3. The patient's immune system was compromised due to a weakened immune gamma chain.
   由于免疫γ链弱化，患者的免疫系统受到了损害。