Microtubules

ID #1556

Does tubulin naturally exist as dimers (when it is not part of a microtubule), or do the alpha and beta polypeptides come together when the GTP binds in the beta subunit?


Dimers form when both alpha and beta subunits bind GTP to their nucleotide binding sites. Then once the dimers form, they can be added to the end of a MT.

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