Building on its partnerships with Gilead Sciences Inc., Sanofi SA and Pfizer Inc., Nurix Therapeutics Inc. brought on Roche Holding AG to help develop bexobrutideg, an oral degrader of Bruton’s tyrosine kinase (BTK). “I really can’t think of a better partner to maximize the opportunity for bexobrutideg to a wide range of patients,” Jason Kantor, Nurix’s chief business officer, told investors on a conference call, later pointing out that Roche has multiple drugs targeting B cells.