Exelixis Hands Merck PI3K-Delta Program in $251M Deal
True to its word, Exelixis Inc. started to prune its pipeline this week, handing Merck & Co. Inc. an exclusive worldwide license to its phosphoinositide-3 kinase (PI3K)-delta research and development program, including XL499 – the company's most advanced preclinical PI3K-delta inhibitor – and related compounds.
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