NR2F1 and breast neoplasm: To assess whether the specific correlation of the expression of Vav, Nr2F1 and Zeb2 proteins found in 4T1 cells could be conserved in human tumors, we performed further coexpression matrix analyses using a large microarray dataset that contained samples from normal tissue as well as HER2+, luminal A, luminal B, and basal breast tumors (n = 1097 samples).