Table 2.

Comparison of cellular localizations of HSP70 proteins.

	Cytoplasm	Nucleus	Mitochondria	ER	Plasma Membrane	Extracellular	Exosomes
Hsp70	++	+			+	+	+
Hsc70	++	T			+	+	+
Grp78	+	+	+	++	+	+	+
Mortalin	+	+	++	+	+	+	+

+: observed to be present at indicated location; ++: primarily present at indicated location; T: transiently present at indicated location.