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30 Cards in this Set

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  • Back
subunits of microtubules
GTP alpha/beta tubulin heterodimer
perferential site of incorporation of microtubules
+ End (beta-tubulin)
polarity of microtubules
yes
enzymatic activity of microtubules
GTPase
motor proteins of microtubules
Kinesins

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