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HER2/PD-L1 BsAb suppressed the proliferation of HER2+tumor cells.A, HER2/PD-L1 BsAb and trastuzumab, but not avelumab, could bind to SKBR3 cells. B, HER2/PD-L1 BsAb and trastuzumab, but not isotype control, suppressed SKBR3 cells proliferation in CCK-8 assay.
