In accordance with previous reports (Citri et al., 2004; Patel et al., 2013; Xu et al., 2005), HER2-expressing breast cancer cells were more sensitive to 17-AAG (Figure 1—figure supplement 1C and Table 1), but again there was no correlation with MAL3-101 sensitivity/resistance. The gene discussed is ERBB2; the disease is breast carcinoma.