A small rodlike structure, about 4-7 nanometers in diameter, present in numbers in the cytoplasm of many eukaryotic cells.
- Actin is the major constituent protein of microfilaments in eukaryotic cells.
- Some cells possessed abundant, randomly arranged thin microfilaments in their cytoplasm.
- If microfilaments antagonize microtubules, this uneven distribution of microfilaments should affect microtubule morphology.
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