Cultured MDA-MB-436 cells were treated with KMTR2 (IgG1-Fc) or IgG1 control ± ROCK1i (GSK269962) for 6 hrs. After 6 hrs, 500nM anti-PD-L1 avelumab (IgG4-Fc) was added to the media for additional 1 hr. Cellular lysates were pulled down with anti-hu-IgG4 specific beads. (G) Immunoprecipitated lysates and leftover supernatant after various treatments were run at the same time followed by blotting with ROCK1, PD-L1 and CMTM6. Total lysates as a control were also generated in exactly similar conditions and run next to supernatant and IP samples. Blue arrows indicate cleaved and activated ROCK1. 