The deals continued to flow during day two of the J.P. Morgan Healthcare Conference. Privately held Arrakis Inc., which specializes in aiming at small-molecule RNA targets, primarily cancers, has signed onto a collaboration with Amgen Inc. that could bring in billions in future payments should it hit all the milestones and program options are exercised. Dren Bio Inc., meanwhile, will collaborate with Pfizer Inc. to develop bispecific antibodies for oncology targets. Dren could receive more than $1 billion in the deal that includes a $25 million in cash up-front payment from Pfizer.