21.   The researchers do not yet have the precise gene isolated, but merely know its approximate location, on the bottom half of the X chromosome.

22.   The scientists do not yet have the DSS gene isolated, but merely know its approximate location.

23.   They isolated the gene, grew it in a common bacterium and extracted the protein made by the gene.

24.   Thousand Oaks, Calif.-based Amgen was just one of several biotechnology firms racing to isolate the gene.

25.   Two rival teams of scientists in France and the United States have been racing to isolate the gene for a year.

26.   When genes of interest have been isolated by the bead system, the next step is to identify them.

27.   With those clues, he and his team began the painstaking process of isolating gene after gene, comparing their DNA sequence to the original sample.

28.   Yet it was Israeli researcher Yossi Shilo, aided by associates in other countries, who ultimately isolated the gene in his Tel Aviv University lab.

29.   Scientists isolate a gene that could unlock the mysteries of cancer.

30.   Scientists recently isolated the gene linked to the disorder, raising hopes that a gene therapy cure might one day be found.