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30 Cards in this Set
- Front
- Back
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subunits of microtubules
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GTP alpha/beta tubulin heterodimer
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perferential site of incorporation of microtubules
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+ End (beta-tubulin)
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polarity of microtubules
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yes
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enzymatic activity of microtubules
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GTPase
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motor proteins of microtubules
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Kinesins
dyneins |
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microtubules: major group of associate proteins
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microtubule associated proteins (MAPs)
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microtubules: structure
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stiff, hollow tube
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microtubules: distribution
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all eukaroytes
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microtubules: primary fxns
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support, intracellular transport, cell organization
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intermediate filaments: subunits
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various globular proteins
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intermediate filaments: location in cell
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internal
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intermediate filaments: polarity
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no
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intermediate filaments: enzymatic activity
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none
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intermediate filaments: motor proteins
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none
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intermediate filaments: major group of associated proteins
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plakins
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intermediate filaments: structure
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tough, ropelike fibers
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intermediate filaments: dimensions
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10 nm diam.
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intermediate filaments: primary fxn
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structural support
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actin filaments:subunits
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ATP-actin monomers
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actin filaments: preferential site of incorporation
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+ End (barbed)
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actin filaments: polarity
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yes
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actin filaments: motor proteins
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Myosins
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actin filaments: major group of associated proteins
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Actin-binding proteins
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actin filaments: structure
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flexible, helical filament
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actin filaments: dimensions
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8 nm diam
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actin filaments: distribution
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all eukaryotes
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actin filaments: primary fxn
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motility, contractility
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direction of kinesin
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( + )
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direction of dynein
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( - )
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direction of myosin
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( + )
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