STUB1 and breast cancer: Recently, Jan et al. studied the expression and correlations among TID1, CHIP, and HER2 in a total of 183 breast cancer histology sections using IHC and immunoblotting assay, and found that the immunohistochemical expression of TID1 and CHIP were positively correlated with each other but were both inversely correlated to that of HER2 [28].