Hep binds to the mtHsp70 ATPase domain. A, SDS-PAGE
analysis of purified mtHsp70 ATPase domain: molecular weight markers (14.4,
21.5, 31, 45, 66.2, and 97.4 kDa) and 1, 3, and 10 μg of purified
70ATPase. B, elution profiles at 4 °C for
70ATPase and Hep chromatographed alone and together on a Superdex
75 column using HKMD buffer lacking nucleotides and containing ATP or ADP (50
μm). Samples (2 ml) introduced onto the column contained 20
μm Hep and 70ATPase.