英语语法分析

Snake venom, cytotoxin and plant poisonous protein such as ricin all have the defence function.

蛇毒、胞毒素及植物毒蛋白质，如蓖麻蛋白等，均具有防御功能。

Conclusion: The cobra venom cytotoxin had a high cytotoxic activity on cultured human cancer cell lines.

结论：眼镜蛇毒细胞毒素对体外培养的人癌细胞有很强的杀伤作用。

To prepare PLGA microspheres of cobra venom cytotoxin and study its characterization and characteristics of in vitro release; 3.

制备眼镜蛇毒细胞毒素plga微球，研究其表征及体外释药性质；3。