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Cytoskeleton

Cell Bio Midterm 3

What is the subunit and structure of actin filaments? Actin, globular
What is the subunit and structure of microtubules? alpha- and beta-tubulin, dimers
What is the subunit and structure of intermediate filaments? Laminins
What is the overall structure of actin filaments? Double stranded helix
What is the overall structure of microtubules? Hollow tube of 13 protofilaments
What is the overall structure of intermediate filaments? Rope-like
What is the function of actin filaments? Muscle contraction
What is the function of microtubules? Separation of chromosomes
What is the function of intermediate filaments? Mechanical strength
What is a nucleation protein for actin filaments? Formins
What is a nucleation protein for microtubules? Gamma-tubulin
What is a nucleation protein for intermediate filaments? N/A
What is an elongation protein for actin filaments? Thymosin (- end)
What is an elongation protein for microtubules? Catastrophe (- end)
What is an elongation protein for intermediate filaments? N/A
What is a capping protein for actin filaments? Cap-Z (+ end)
What is a capping protein for microtubules? TIPs
What is a capping protein for intermediate filaments? N/A
What is a cross linking protein for actin filaments? Fimbrin
What is a cross linking protein for microtubules? MAPs
What is a cross linking protein for intermediate filaments? Plectin
What is a severing protein for actin filaments? Gelosin
What is a severing protein for microtubules? Katanin
What is a severing protein for intermediate filaments? N/A
Created by: goberoi