Microtubules

Definition: Microtubules are hollow rods, functioning primarily to help support and shape the cell. They also function as "routes" along which organelles can move. They are typically found in all eukaryotic cells.
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Chapter 1
The role of microtubules in transport between the endoplasmic reticulum and Golgi apparatus in mammalian cells
Krysten J. Palmer, Peter Watson and David J. Stephens1 ...
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Microtubules in a gel fixated cell.
Main article: microtubules
They are hollow cylinders of about 25 nm, formed by 13 protofilaments which, in turn, are polymers of alpha and beta tubulin.
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Microtubules
are straight, hollow cylinders
have a diameter of about 25 nm
are variable in length but can grow 1000 times as long as they are thick
are built by the assembly of dimers of alpha tubulin and beta tubulin.
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Microtubules act as tracts along which organelles can move. For example, they are associated with movement of vesicles from the Golgi complex to the plasma membrane.
Microtubules are responsible for the movement of cilia and flagella.
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Microtubules
Main article: microtubules
They are hollow cylinders of about 25 nm., formed by 13 protofilaments which, in turn, are polymers of alpha and beta tubulin.
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Microtubules:
Microtubules are cylindrical tubes, 20-25 nm in diameter.
They are composed of subunits of the protein tubulin -- these subunits are termed alpha and beta.
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microtubules -- Type of filament in eukaryotic cells composed of units of the protein tubulin. Among other functions, it is the primary structural component of the eukaryotic flagellum.
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microtubules Filaments about 25 nanometers in diameter found in cilia, þagella, and the cytoskeleton. PICTURE ...
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Cos-2 binds microtubules in an Hh-sensitive manner (Robbins, 1997)
IPs from ovarian extracts show that Sxl is in a complex with Fu and Cos2, along with b- and g-tubulin(Vied, 2001)
Transcriptional Regulation ...
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A network of microtubules, microfilaments, and intermediate filaments that branch throughout the cytoplasm and serve a variety of mechanical and transport functions.
cytosol
(sy-toh-sol) ...
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A collection of microtubules attached to a centromere during mitosis and meiosis that are responsible for the movement of the chromosomes to opposite poles.
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Cytoskeleton - network of microtubules that support and give structure to cell while aiding in intracellular transport
Cytosol - jelly-like material that contains the organelles between the nucleus and the plasma membrane ...
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microtubules Thin tubules assembled from two types of globular tubulin subunits (a and ). Found in cilia, flagella, centrosomes, and other contractile or motile structures.
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During mitosis, chromosome separation requires spindle fibers made of microtubules; spindle inhibitors stop the synthesis of microtubules. Because most adult cells don't divide often, they are less sensitive to these drugs than are cancer cells.
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caption: In the image above (obtained using a fluorescent-light microscope), a dividing cell is seen separating its duplicated chromosomes (blue) for equal distribution into two new cells. Spindle poles serve as centers from which microtubules ...
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axoneme - the motor section of the flagellum which is a construction of microtubules emanating from the centriole at the base of the flagellum.
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Bilateria - group containing all multicellular animals with bilateral symmetry.
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apical complex Dense ring and conelike structure, along with associated microtubules, micronemes, and rhoptries, at the anterior end of an apicomplexan sporozoite.
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centriole
One of two structures in the center of animal cells, composed of cylinders of nine triplet microtubules in a ring. Centrioles help organize microtubule assembly during cell division.
Covered in Lab 5 Sexual Lifecycles and Meiosis ...
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Structure forming at centromere during mitosis for binding microtubules.
Related Terms: Centromere ...
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