| http://digfir-published.macmillanusa.com/lodish_animation/a1702_actin_filaments.html | Chapter 17. Elongation of Actin Filament by Forming FH2 Dimer
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| http://digfir-published.macmillanusa.com/lodish_animation/a1702_actin_filaments_dlap.xml | DLAP questions | 519bca43b11c0f136800009c |