Biontech SE and Bristol Myers Squibb Co. are teaming up to develop Biontech’s BNT-327 in a deal possibly worth over $11 billion. BNT-327 is in the hot new class of bispecific antibodies targeting programmed death-1 (PD-1) or its ligand (PD-L1) and vascular endothelial growth factor (VEGF). The bispecifics take advantage of two well established mechanisms of action that help tumors grow; PD-1/PD-L1, which tells immunogenic T cells not to attack the tumor, and VEGF, which tumors excrete to produce new blood vessels to supply oxygen and other nutrients to the tumor.

Biontech SE is extending its relationship with Biotheus Inc. from a licensing deal to a full-scale acquisition, agreeing to pay $800 million cash and up to $150 million in milestone payments for the Chinese oncology specialist.