We therefore next examined the co-expression correlation between HSPs and co-chaperones including HSP90 family (HSP90AA1, HSP90AB1), HSP70 family (HSPA1A, HSPA1B, HSPA8) and BAG family (BAG1, BAG2, BAG3) among 960 breast tumor samples registered in the Cancer Genome Atlas (TCGA). The gene discussed is BAG1; the disease is breast neoplasm.