AG01 is a monoclonal antibody targeting the anti-granular protein precursor (GP88). It inhibits the proliferation and migration of triple-negative breast cancer (TNBC) cells, reducing the expression of phosphorylated protein kinases such as p-Src, p-AKT, and p-ERK, as well as oncogenic proteins like Axl, c-MET, HIF-1alpha, and VEGF. In TNBC xenograft mouse models, AG01 suppresses tumor growth and the expression of Ki67 in vivo. AG01 is useful for research involving cancers like TNBC.