1.   Eastman said the enzyme has been found in every type of cancer yet examined.

2.   The discovery is particularly significant because the enzyme is found in most types of cancer.

3.   The Dallas group found the enzyme in the endometrium, or lining of the uterus, in women with endometriosis.

4.   The enzyme is not found in women free of the disorder.

5.   The enzyme is found in most types of cancer, the researchers said.

6.   The enzyme was found in certain women who are unable to conceive because their immune systems attack sperm and kill it.

7.   The two enzymes are found in viruses that infect E. coli bacteria and apparently play a role in checking for genetic defects during viral replication, Sklar said.

8.   They later found an enzyme in the tissues surrounding breast tumors that plays an important role in metastasis.

9.   The enzyme was previously found only inside cells.