** Shares of drug developer Arcus Biosciences RCUS.N rise
12.1% to $17.15 in extended trading
** Drugmaker Gilead GILD.O invests $320 mln or $21/shr in
RCUS, bringing GILD's stake in co to 33%
** Cos also discontinue a late-stage trial testing drug
candidate domvanalimab in combination with another experimental
drug zimberelimab in treating a type of lung cancer
** Cos reprioritize joint development of domvanalimab to
focus on advancing two late-stage trials testing the drug in
treating lung cancer and gastrointestinal cancer, respectively
** Stock fell 7.6% in 2023
(Reporting by Puyaan Singh)
((Puyaan.Singh@thomsonreuters.com;))