In contrast, human Hsp70 (HSPA1A/B) is barely detectable in most non‐cancer cells and reaches only about 0.04–0.06 μM upon heat shock (Finka et al, 2015), but can reach around 0.7–10 μM in cancer cells (Geiger et al, 2012). The gene discussed is HSPA1A; the disease is cancer.