<A HREF="http://ads.guardian.co.uk/event.ng/Type=click&FlightID=75286&AdID=89430&TargetID=17517&Values=30,46,50,61,73,84,90,100,110,150,206,231,808,813,860,909,913,1178,1260,1288,1390,1391,1392,1454,1457,1461,1489,1576,1581,1609,1667,1679,1727,1744,1749,1760,1804,1808,1865,1866,1948,2063,2064,2107,2134,2135,2156,2209,2210,2214,2284,2324,2326,2362,2432,2467,2758,2759,3102,3130,3142,3183,3184,3207,3312,3348,3374,3522,3595,3725,3756,3797,3904,3928,3994,3998&Redirect=http://www.guardianweekly.co.uk/" target="_top"><IMG SRC="http://adimage.guardian.co.uk/top_run_of_sites/2007august/guweeklyMPU080807genes.gif" WIDTH=300 HEIGHT=250 BORDER=0></A>