1.   He identified an enzyme, called Factor XIII, that binds proteins together to form what amounts to a plug in the wound.

2.   They have identified an enzyme, aromatase, that may signal the presence of endometriosis or predict it before it occurs, Schenken said.

3.   They said their identical conclusions provide the final piece to fully identifying an enzyme called telomerase.

4.   Ever since the beta-secretase enzyme was identified as part of the disease process, many laboratories have attempted to isolate it.