Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

A motor protein like kinesin-1 cannot use an IF as a track because it lacks polarity.

Can someone elaborate on this answer?

share|improve this question
2  
Just a guess: the IF doesn't have directionality. It would be like a single-lane, but two-way road. –  MCM May 29 at 20:17

1 Answer 1

Polarity essentially means a plus end (growing/polymerising) and a minus end (depolymerising). Look at microtubule (MT) (http://en.wikipedia.org/wiki/Microtubule). So molecules such as Kinesin-1 (http://en.wikipedia.org/wiki/Kinesin) use the hetero-dimeric nature of MT (alpha and beta subunits) and its polarity to orient themselves and move directionally along MT in an energy dependent manner.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.