Onyx Pharmaceuticals, the South San Francisco, California-based com­pany that developed and now mar­kets Kyprolis (car­filz­o­mib), announced yesterday eve­ning that it is being acquired by Amgen.

Amgen (NASDAQ:AMGN), which is based outside of Los Angeles, is the world’s largest bio­tech com­pany.

Within the multiple myeloma community, Amgen is known most for its anemia medications – Aranesp (darbe­poetin alfa) and Epogen (epoetin alfa, also mar­keted as Procrit and Eprex) – as well as its drugs that in­crease the body’s pro­duc­tion of white blood cells – Neupogen (filgra­stim) and Neulasta …