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Updated: Aug 10, 2026

Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays
Published on: February 4, 2021
The use of native thick filaments in in vitro motility assays
J R Sellers1, Y J Han, B Kachar
1Laboratory of Molecular Cardiology, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892.
Abstract:
Native thick filaments from the clam, Mercinaria mercinaria translocate actin filaments both toward and away from the center of the thick filament in an in vitro motility assay. The thick filaments from the adductor muscle are about 10 microns long whereas those from the catch muscle are 30-50 microns long. These thick filaments should prove useful in understanding the mechanism of myosin-dependent movement of actin filaments.
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