Vertex Pharmaceuticals' 4.9billionpurchaseofAlpineImmuneSciencesprobablywon′tbethelastacquisitionofacompanyfocusedonkidneydisease.ThebiotechnologyindustryisgettingmoreattentionthanusualfollowingabuyoutofferforAlpineImmuneSciences(ALPN−0.0565 per share, or about 4.9billionincash.OnApril9,thedaybeforetheannouncement,Alpine′sstockpriceclosedatabout39 per share ...