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ActA, a surface protein activates the ______________

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ActA, a surface protein activates the ______________

(a) Arp2/3 complex

(b) Sar1

(c) Arf1

(d) EcoR1

The question was posed to me by my school teacher while I was bunking the class.

Enquiry is from Non-muscle Motility topic in section Cytoskeleton and Cell Motility of Cell Biology

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The correct answer is (a) Arp2/3 complex

Easiest explanation: ActA is a surface protein found on one side of the bacterium Listeria monocytogenes, when inside the host cell it activates the Arp 2/3 complex and other proteins that work together to direct the process of actin polymerization.

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