ID #1567

I know that the -end of a microtubule originates from the y-tubulin, but is it he B-tubulin or A-tubulin that anchors into the y-tubulin? Is it wrong to say that tubulin dimers ATTACH to the y-tubulin?

I don't think it would be incorrect to say that tubulin dimers attach to gamma tubulin. That gamma tubulin forms a ring which physically resembles the plus end of a microtubule, and this is what the tubulin dimers attach to. As far as which end it is, I believe that the beta tubulin faces the plus end and the alpha subunit faces the minus end, so I guess it would be the alpha subunit that actually contacts the gamma tubulin ring.


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