1.   A mouse is injected with the target protein causing the mouse to develop thousands of antibodies to it.

2.   Essentially the harpoon protein is squashed down like a jack-in-the-box until some event, probably contact with the target proteins on the host cell, triggers its release.

3.   That also meant investing in X-ray crystalography and computer modeling to see a three-dimensional view of the target proteins.

4.   The factor has a groove that precisely fits its target protein inside the cell.

5.   The whole library can be poured over the target protein to see which antibodies stick.

6.   Then they try to either design or find a compound that can attach itself to the target protein, thereby changing the course of the disease.