Extra actin filaments at the periphery of skeletal muscle myofibrils.
Myofibrils isolated from a variety of vertebrate muscle fibers have a set of peripheral filaments associated with the periphery of the Z line free to move away from the surface of the myofibril. Decoration with myosin subfragment 1 shows that these are actin filaments.
Bard
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Department of Anatomy, University of Pennsylvania, Philadelphia 19104-6018.
Franzini-Armstrong
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D008841:Actin Cytoskeleton / Q000648:ultrastructure*; D000199:Actins / Q000032:analysis*; D000818:Animals; D003400:Astacoidea; D002645:Chickens; D008854:Microscopy, Electron; D009132:Muscles / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure*; D011817:Rabbits; D011898:Ranidae; D051381:Rats
D000199:Actins