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Fig. 4. Supervillin binds to the S2 domains of both of the nonmuscle myosins – myosin IIA and myosin IIB. GST-tagged SV1-174 (left) or GST only (right) were pre-bound to glutathione-agarose beads and incubated with the hexa-histidine (6xHis)-tagged recombinant S2 domain from the heavy chain of nonmuscle myosin IIA (S2-MHC IIA), nonmuscle myosin IIB (S2-MHC II) or skeletal muscle myosin II (S2-Sk-MHC II). Samples (15 µl) of void volumes (V, lanes 1), washes with binding buffer (W, lanes 2), washes with the indicated concentrations of NaCl in binding buffer (lanes 3-6) and eluates with 5 mM glutathione (E, lanes 7) were analyzed on immunoblots stained with anti-GST antibodies (top panels) or anti-6xHis antibodies (lower panels).