Within an actin filament, each actin subunit is surrounded by _______ neighboring actin subunits
A、a. one
B、b. two
C、c. four
D、d. eight
A、a. one
B、b. two
C、c. four
D、d. eight
A、contextual
B、symbolic
C、dynamic
D、irreversible
A、a. predominantly to filament (+) ends.
B、b. predominantly to filament (−) ends.
C、c. equally to both filament ends.
D、d. along the length of filaments.
A、a. Listeria ActA protein binds and inactivates the Arp2/3 complex.
B、b. Listeria ActA binds VASP, which enhances ATP-actin assembly.
C、c. Cofilin is necessary to accelerate the assembly of the (−) end of the filament.
D、d. CapZ promotes the elongation of the filament.
A、a. to center myosin thick filaments
B、b. to attach actin thin filaments to the Z disk
C、c. to maintain a constant actin thin filament length
D、d. to make contraction sensitive to Ca2+
A、a. ATP-binding.
B、d. dephosphorylation.
C、c. Ca2+-binding.
D、b. phosphorylation.
A、a. the head domain
B、b. the rod domain
C、c. the light chains
D、d. the tail domain
A、a. a actinin
B、b. cofilin
C、c. fimbrin
D、d. profilin
A、a. lateral association of only g-tubulin subunits.
B、b. head-to-tail association of only g-tubulin subunits
C、c. lateral association of tubulin dimers.
D、d. head-to-tail association of tubulin dimers.
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