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The relationship between stress fiber-like structures and nascent myofibrils in cultured cardiac myocytes

A complex, multistage molecular model is presented for myofibrillar assembly and maturation and it is of considerable theoretical interest to note that mature cardiac myocytes, like mature skeletal myotubes, lack readily detectable stress fibers.
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Independent assembly of 1.6 microns long bipolar MHC filaments and I-Z-I bodies.

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Differential distribution of subsets of myofibrillar proteins in cardiac nonstriated and striated myofibrils

Cultured cardiac myocytes were stained with antibodies to sarcomeric alpha-actinin, troponin-I, alpha-actin, myosin heavy chain (MHC), titin, myomesin, C-protein, and vinculin. Attention was focused…
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FORMATION OF ARROWHEAD COMPLEXES WITH HEAVY MEROMYOSIN IN A VARIETY OF CELL TYPES

The significance of HMM-filament binding is discussed in view of the finding that arrowhead complexes form in types of cells not usually thought to contain actin filaments.
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The relationship of cell division to the acquisition of adrenergic characteristics by developing sympathetic ganglion cell precursors.

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DNA synthesis and myogenesis.

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MyoD converts primary dermal fibroblasts, chondroblasts, smooth muscle, and retinal pigmented epithelial cells into striated mononucleated myoblasts and multinucleated myotubes.

It is reported that MyoD converts normal dermal fibroblast, chondroblasts, gizzard smooth muscle, and pigmented retinal epithelial cells into elongated postmitotic mononucleated striated myoblasts, which fuse into typical anisodiametric multinucleated myotubes that often contract spontaneously.
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MITOSIS AND INTERMEDIATE-SIZED FILAMENTS IN DEVELOPING SKELETAL MUSCLE

It is concluded that not all "thin" filaments in myogenic cells are uniquely associated with myogenesis, and Definitive thick (about 150 A) or thin (about 60 A) myofilaments are not found in skeletalMyogenic cells arrested in metaphase.
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The vinculin/sarcomeric-alpha-actinin/alpha-actin nexus in cultured cardiac myocytes

Experiments are described supporting the proposition that the assembly of stress fibers in non-muscle cells and the assembly of myofibrils in cardiac cells share conserved mechanisms. Double staining…
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Intermediate filament proteins in the developing chick spinal cord.

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