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Arqule sees strength in early BTK inhibitor data; shares rise on phase I CLL news

Shares of Arqule Inc. (NASDAQ:ARQL) hit a 52-week high Friday on news that the company’s Bruton’s tyrosine kinase (BTK) inhibitor, ARQ-531, achieved partial responses in four of six heavily pretreated people with relapsed/refractory (r/r) chronic lymphocytic leukemia (CLL) during an ongoing phase I trial.