1.   One of the three drugs they received was ritonavir, an inhibitor of the enzyme protease, which processes key viral proteins.

2.   American researchers have found that firstborn babies have higher levels of a key immune protein associated with allergies.

3.   But tuberculosis researchers in Texas have unraveled the secrets of a key protein that helps the bacteria to thrive and to carry on their destructive work in the lungs.

4.   Genentech then claimed Norditropin infringed a new Genentech patent, which covers a process for producing a key protein for human growth hormones.

5.   In others, scientists have no idea why a key protein undergoes the fatal change.

6.   Knowledge of the complete DNA sequence will let companies clone bits of it, including the genetic blueprints for enzymes, which are key proteins for performing cellular rearrangements.

7.   They found that key proteins between the two showed significant discrepancies.

8.   Wednesday, Aventis offered several new pieces of evidence for its case that the key protein in StarLink is not an allergen.

9.   Wilfried Karmaus of Michigan State University in East Lansing and his colleagues have found that firstborn babies have higher levels of a key immune protein associated with allergies.