21.   Human antibody genes are inserted into viruses known as phages, which display them on their surfaces.

22.   In gene therapy new genes are inserted into cells, often using a virus as the vector to deliver the genes.

23.   In its place they inserted human genes for the two proteins that constitute the T-cell lock.

24.   In the last decade, genetic engineers have inserted foreign genes into plants to endow them with various abilities including withstanding exposure to herbicides and creating their own pesticide.

25.   In theory, by inserting the gene for human insulin into bacteria, scientists could turn these microbes into drug factories.

26.   Most often viruses are harnessed for the task, because viruses are able to insert their genes into cells and force them to make foreign proteins.

27.   Mycogen last year got a crucial patent covering a process for inserting the genes into plants.

28.   Nationally, similar problems are affecting experiments seeking to treat a variety of diseases by inserting genes into the body to replace missing or defective ones.

29.   Most gene therapy experiments, in which genes are inserted into the body to correct inherited diseases or treat cancer, have failed to show much effect.

30.   No one else had ever successfully inserted three genes into a plant.