21.   If the PGA genes are on the average linked to one of responsible genes for duodenal ulcer, the association is expected to vary among populations.

22.   Dr Steel said it was difficult to estimate when the gene would be located but he thought it would be months rather than years.

23.   From them, genes can be located which may be carried by far greater numbers.

24.   Consistent with these pleiotropic effects of CREB, the CREB gene is widely expressed but the activity of CREB is controlled in a cell type specific manner.

25.   Although not previously described in the literature at the molecular level, ZNF gene clustering is probably a common phenomenon in mammalian genomes.

26.   POU domain genes have been isolated from a variety of organisms and show diverse patterns of expression.

27.   In only one transgenic line, there is ectopic expression of the transgene in the thymus indicating that the gene is sensitive to position effects.

28.   Also, the genes are not permanent occupants of the brain cells.

29.   An Affymetrix chip can monitor thousands of genes at a time and can also measure how active each gene is in a cell.

30.   Analysis of the follicle cells showed the Sonic hedgehog gene was active in the injected areas of the skin but not elsewhere.