Nucleus-anchoring cytoskeleton in chicken red blood cells

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Abstract
Cytoskeleton of chicken erythrocytes was studies studied after extraction of the cells with Triton X-100. In phase contrast microscopy the extracted cells were seen as ghost-like structures with preserved morphology, distinct nucleus and surrounding plasma membrane remnant. In electron microscopy, dense matrix-like nucleus, fibrillar plasma membrane residue and filaments, ca. 10 nm in diameter, traversing the cytoplasmic domain, were seen. Distinct bands of molecular weight 68000, 53000, 32000 and bands of both higher and lower molecular weight were obtained by polyacrylamide gel electrophoresis of the extracted cells. These results indicate that intermediate filaments, forming the nucleus-anchoring cytoskeleton, are present in nucleated chicken erythrocytes as part of cellular cytoskeleton.

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