Another service? http://hdxvideos.site xnxx A potential bid for Alexion would follow Roche's failedattempt last year to buy U.S. gene-sequencing company IlluminaInc for $6.7 billion after shareholders held out for ahigher price. (Additional reporting by Ransdell Pierson in New York; Editingby Michele Gershberg, Matthew Lewis and Leslie Gevirtz)