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3 Cards in this Set

  • Front
  • Back

Myosin

Primary motor protein that interacts with Actin. In addition to its role as a thick filament in a myofibril, it can be involved in cellular transport.


-Each myosin subunit has a single head and neck; movement at the neck is responsible for the "power stroke" of sarcomere (basic unit of striated muscle) contraction.

Kinesins

Motor protein associated with microtubules. Has 2 heads, at least one of which remains attached to Tubulin at all times.


-Align chromosomes in metaphase, depolarize microtubules in anaphase (mitosis)


-Bring vesicles (small structures consisting of fluid enclosed by a lipid bilayer) toward Positive end of axonal microtubule (synaptic terminal)

Dyneins

Motor protein associated with microtubules. Has 2 heads, at least one of which remains attached to Tubulin at all times.


-Involved in the sliding movements of Cilia and Flagella


-Bring vesicles (small structures consisting of fluid enclosed by a lipid bilayer) toward Negative end of axonal microtubule (soma)