Expression of HSP70 and associated co-chaperones in the DNAJ family (also known as HSP40) were upregulated at 18°, 21°, and 25°. HSP70 is an important chaperone protein that stabilizes and refolds proteins in their correct conformation under stress conditions (reviewed in Silver and Noble 2012). Members of the DNAJ family of proteins regulate the function of HSP70 by stabilizing the interaction between HSP70 and the target proteins (Mayer and Bukau 2005; Qui et al. 2006).