“In each myofibril are a number of sacromere, stacked end to end like carriages of a train.”

“Their idea was that the myofibril contains toothbrush-like structures facing one another and pushed together so that their bristles interpenetrate.”

“As mentioned earlier, the myofibril is a columnlike array of filaments.”

“Of the myofilament proteins, myosin and actin are known to play a direct part in the contractile event.”

“These overstretched sarcomeres have little myofilament overlap, and are likely to fail under tension and become disrupted.”

“The myofilament lattice collapse in these embryos has been analyzed by immunofluorescence with antibodies to myosin A and actin.”

“Thick myofilaments are composed of several hundred molecules of a fibrous protein known as myosin.”

“Actin, which constitutes about 25 percent of the protein of myofilaments, is the major component of the thin filaments in muscle.”

“The myofilaments are composed of several different proteins, constituting about 50 percent of the total protein in muscle.”

“Fast-acting muscles have highly ordered structure due to the closely interrelated disposition of membranes and myofibrils.”

“Individual muscle cells are extremely elongated and enclose many-stranded cables woven from threads called myofibrils.”

“In cross section, skeletal muscle fibers are seen to be composed of numerous small aggregates of contractile substance, the myofibrils.”