polystichinin

例句：

1. 1.The protein is a key component of the immune system.
   这个蛋白质是免疫系统的关键成分。
2. 2. Polysaccharides are found in many types of food and have health benefits.
   多糖存在于许多类型的食品中，具有健康益处。
3. 3. Polysaccharides are also used as a prebiotic for gut health.
   多糖也被用作肠道健康的预生元。