heavy meromyosin

heavy meromyosin

[′hev·ē ¦mer·ə¦mī·ə‚sin]
(biochemistry)
The larger of two fragments obtained from the muscle protein myosin following limited proteolysis by trypsin or chymotrypsin.
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Stepwise motion of an actin filament over a small number of heavy meromyosin molecules is revealed in an in vitro motility assay.