Actin and Myosin

ID #2366

so are G actin and F actin called polar molecules, even though this polar doesn't have anything to do with positive or negative charges? They are just called polar molecules because they have a barbed and a pointed end.


Yes, G and F actin are polar because their ends (aka poles) have different properties and are called barbed or pointed, but you are also correct that the difference has nothing to do with positive or negative charges, but instead has to do with affinity for polymerization. 

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