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Questions and Answers
What is the molecular weight of actin?
During actin polymerization, what is the critical concentration (Cc) defined as?
What provides the energy required for adding actin subunits onto the filament during elongation phase?
How many protofilaments are alpha and beta tubulin molecules arranged in to form tubules?
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What type of nucleotide provides energy for dimer binding in tubulin polymerization?
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Actin polymerization occurs in three phases: nucleation, elongation, and steady phase.
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During the nucleation phase, G-actin subunits collide with each other and weakly associate to form oligomers.
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The critical concentration (Cc) is higher when there is a higher concentration of actin subunits and more frequent collisions.
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Tubulin forms heterodimers composed of alpha and beta tubulin molecules.
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Tubulin dimers stick together with the use of nucleotide ATP, which provides energy for the polymerization process.
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