tNASP, not sNASP activates the ATPase activity of HSPA2. ATPase activity of HSPA2 is presented as inorganic phosphate (μM) liberated by HSPA2 within 60 min of incubation at 37°C in the presence of tNASP or sNASP, CDC2, and histone H1a. Data are represented as mean ± SD. The asterisks indicate significantly different values (p < 0.05). Figure 7 is a representative result from a total of 3 experiments.