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please answer my some questions :

Asked by piyu1996 13th April 2010, 10:52 PM
Answered by Expert
Answer:

2) A microtubule is a hollow cylinder about 24 nm in diameter.Microtubules are polymers of α- and β-tubulin dimers. The tubulin dimers join end to end in protofilaments. The protofilaments then bundle into hollow cylindrical filaments. Typically, the protofilaments arrange themselves in an imperfect helix.

 

Kindly post each query separately.

Answered by Expert 16th April 2010, 8:53 AM
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