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Fig. 8. Binding of 6xHis-ABD to actin in vitro. (A) Cosedimentation of 10
µM 6xHis-ABD with 2.5 µM F-actin by ultracentrifugation. (B)
Bundling of 10 µM actin in the presence of 6xHis-ABD analyzed by
low-speed centrifugation. S, supernatant; P, pellet. Positions of ABD and
actin are indicated on the right. (C) The effect on polymerization kinetics of
8 µM actin in the absence or presence of various amounts of 6xHis-ABD
observed by the change in pyrenyl-actin fluorescence.