31.   Progressively refining the material, the scientists eventually identified betulinic acid as the effective element, Pezzuto said.

32.   Scientists have identified genetic changes that might help doctors predict the risk of the potential spread of breast cancer to other parts of the body.

33.   Scientists identified Cryptoperidiniopsis, a toxic micro-algae, in local waters and believe it may have a role in the fish disease.

34.   Scientists have identified more than two dozen rare plant and animal species in the mountains.

35.   Scientists have identified rare cases in which injuries to the brain in infancy prevented people from learning normal rules of social and moral behavior in childhood and adolescence.

36.   Scientists have identified two genes connected with the ALS, which came to public attention when the baseball player Lou Gehrig contracted it.

37.   Scientists there identified the DNA fragments using a well-established technique called RFLP, for restriction fragment length polymorphism.

38.   She said she believes her family members would be willing to undergo DNA testing to allow scientists to identify the remains.

39.   Scientists are rapidly identifying disease-causing genes and new microbes.

40.   So far, scientists have identified at least three binding proteins on the sperm.