We investigated by immunohistocytochemistry (IHC) the protein levels of RalA and RalB in 502 invasive ductal carcinoma representative of the four main molecular subtypes (luminal A, luminal B, HER2+, triple-negative) (see Figure 7—figure supplement 1A for intensity scores). The gene discussed is ERBB2; the disease is invasive ductal breast carcinoma.