In 1992, Michael Zasloff discovered Squalamine. The molecular compound can be found in dogfish sharks. The molecule inhibits growth of blood cells which possibly could stop cancerous cells from multiplying. It is positively charged, and upon entrance to the cell it sticks to the inner membrane of the cell, which is negatively charged. This allows positive charged proteins to fall and break off. Without those cells that break off, the virus cannot reproduce. Squalamine is very unique to the dogfish shark allowing the shark to rarely get cancer. Squalamine can help cure Hepatitis B and D and dengue fever. Currently Squalamine can fight against six diseases, but there is a level of toxicity which researchers have discovered (National Geographic).