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Vimentin (green) and glial fibrillary acidic protein (GFAP) (red) intermediate filaments in astrocytes and fibroblasts co-culture. Those appearing golden orange are stained with both vimentin and GFAP (Encorbio).
Cytoskeleton Eukaryotic cells (of animals, plants, fungi, protists, and chromists) have a structural framework of proteins termed cytoskeleton (skeleton of cells) for forming their shapes, keeping the organelles and internal components in place, movement, and intracellular transport and signaling. There are three groups of cytoskeletal proteins, namely:
1) Microfilaments 2) Intermediate filaments, and 3) Microtubules. Crescentin The intermediate filament counterpart in prokaryotes (bacteria) is the crescentin.
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