HSPA8 and cancer: Secondly, the cellular concentration of Hsc70 averaged over 11 different cancer cell lines is around 12–18 μM under non‐stress conditions (Geiger et al, 2012) assuming a total cellular protein concentration of 100–150 mg/ml (Gillen & Forbush, 1999; Finka et al, 2015) and can reach 14–21 μM upon a mild heat shock of 41°C for 4 h (Finka et al, 2015).