Gilead deepens Galapagos ties with $5.1 billion deal

(Reuters) - Gilead Sciences Inc will invest $5.1 billion (4.1 billion pounds) to raise its stake in Galapagos NV and partner with the Belgian-Dutch biotech firm to develop and commercialise its treatments for a ten-year period, the companies said on Sunday.The investment in Galapagos, which comes nearly four years after the firms partnered to develop a drug targeting inflammatory diseases, includes an upfront payment of $3.95 billion and a $1.1 billion equity investment from Gilead."Gilead..