1. The vacuolating cytotoxin is a unique proteinous cytotoxin produced by H. pylori that showed no striking primary sequence homology with other known bacterial toxins.

2. OBJECTIVE To purify cytotoxin(CTX) from Naja naja atra venom, and to study its antitumor activity.

3. The invention discloses a snake poison cytotoxin, the preparation method and the application.

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

5. OBJECTIVE To purify cytotoxin atra venom, and to study its antitumor activity.

6. OBJECTIVE To purify cytotoxin from Naja naja atra venom, and to study its antitumor activity.

7. In addition, experiments of undue toxicity prove that the cytotoxin has slight side effects.

8. Aati - tumors : The dye lignin has the cytotoxin activeness to the human boby rhinitis cancer ( KB ) cell.

9. The petroleum ether fraction of the soft coral Sinularia sp. exhibited high lethal rate to brine shrimp and strong cytotoxin to KB and KBV200 cells.