Merck, through a subsidiary, has unveiled plans to acquire cancer drug company ArQule for $2.7 billion. ArQule is a biopharmaceutical company focused on kinase inhibitor discovery and development for the treatment of patients with cancer and other diseases. ArQule’s lead investigational candidate, ARQ 531, is a novel, oral Bruton’s tyrosine kinase (BTK) inhibitor currently in a Phase 2 dose expansion study for the treatment of B-cell malignancies.   “ArQule’s focus on precision medicine has yiel...