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If you're the motor protein up front, be prepared to do the heavy pulling.
That's one conclusion from a Rice University-led study of the mechanisms that drive kinesins, motor proteins that carry cargo inside cells. The study shows it takes a lot of counterforce to slow down a determined kinesin. Nor does the protein get much help from colleagues that bring up the rear.
Through computer simulations, the researchers provide the first molecular-level details of how kinesins respond to external forces while confirming earlier experiments by co-author Michael Diehl that showed teams of kinesins work best only when they're in close proximity and can pull in the same direction.
originally posted by: Devino
originally posted by: dashen
Its molecular clock work.
It all works on pressure and tension and chemical receptors and reactions
To me this appears to be a gross over-simplification almost to the point of being incorrect. I am not trying to disagree with you just pointing out the part of ‘how’ all this actually works as a big unknown. Scientific knowledge is replete with such examples.
originally posted by: dr1234
We know exactly how every process shown works.
Are you sure? I think we could say that we know what is happening, for the most part, and can predict what will happen, to a fair degree, yet to make the claim that we know “how” all of this happens seems like a giant leap.
The entropic nature of energy is said to be universally homogeneous except when it comes to life. Self-organization and/or negative entropy appears to defy this law of thermodynamics.