Data in Figures 2A–C showed that upregulation of gp96 rescued cell viability and decreased the ratio of Annexin V-FITC or PI-positive apoptotic cells in the PS-BC cells subjecting to high-dose paclitaxel stimulation, as determined by MTT assay (Figures 2A, B) and FCM assay (Figure 2C and Figures S3A, B), implying that gp96 overexpression increased paclitaxel-resistance in PS-BC cells. Here, HSP90B1 is linked to breast cancer.