PSME3 and breast carcinoma: Although, there was no statistical correlation between the staining index of GMFG and clinicopathological characteristics (stage, T, N, ER status, PR status, HER2 status, grade and ki-67) in the results of IHC, the Supplementary Figure 3 shown trends for GMFG protein expression to be higher in ER+ and HER2+ breast cancer.