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Myosin Subfragments
ATPase, Actin-S1; Actin S1 ATPase; Actoheavy Meromyosin; Actomyosin Subfragment 1 ATPase; H-Meromyosin; Heavy Meromyosin; Heavy Meromyosin Subfragment-1; Heavy Meromyosin Subfragment-2; Light Meromyosin; Myosin Subfragment-1; Myosin Subfragment-2
Parts of the myosin molecule resulting from cleavage by proteolytic enzymes (PAPAIN; TRYPSIN; or CHYMOTRYPSIN) at well-localized regions. Study of these isolated fragments helps to delineate the functional roles of different parts of myosin. Two of the most common subfragments are myosin S-1 and myosin S-2. S-1 contains the heads of the heavy chains plus the light chains and S-2 contains part of the double-stranded, alpha-helical, heavy chain tail (myosin rod).